Octaphenyl-poss, 98% 5gram

Introduction

In the present era, the shortage of energy and pollution of the environment become more and more serious with the development of society. Confronting  the urgent problems of environmental pollution and resource exhaustion, the development of an alternate, sustainable ,and clean energy technology is extremely necessary. Read more  Octaphenyl poss in Pakistan…

The lithium-ion battery, as an efficient and clean energy storage system, has attracted widespread attention for a wide variety of new energy vehicles by virtues of its high energy density, low self discharge rate, excellent power density, long cycle lifetime as well as low memory effect and environmental friendliness [1], [2], [3], [4], [5]. It is widely recognized that lithium-ion battery is mainly composed of four parts including cathode, anode, separator and liquid electrolyte [6].

And separator plays an indispensable role in impeding the immediate contact of cathode and anode and providing the effective channels for the transmission of lithium-ions between electrodes, which has a significant influence on the safety performance and cycle capability of battery [7], [8], [9], [10]. Currently, the polyolefin microporous membranes have became the main commercialized separators owing to their excellent mechanical property, prominent.

Abstract

In this study poly a hybrid Poly-m-phenyleneisophthalamide/Octaphenyl-Polyhedral oligomeric silsesquioxane (PMIA/Octaphenyl-POSS) membrane (HPPS) was fabricated by electrospinning technique and its application performance as lithium-ion battery separators was discussed. The organic-inorganic feature of Octaphenyl-POSS (OPS) endowed admirable compatibility of membrane matrix for the HPPS membranes. The nanofiber membranes with OPS nanoparticles were provided with commendable thermal stability,

Robust mechanical strength (21.79 MPa), high porosity and electrolyte uptake, which laid a good foundation for improving the safety and cycle performance of the cells with the separator. The lithium-ion battery with the HPPS separator displayed a high ionic conductivity of 1.93 × 10⁻³ S·cm⁻¹ and a stable electrochemical window of 4.98 V.

More significantly, the HPPS nanofiber membrane based Li/LiCoO₂ cell exhibited excellent cycling stability with high first discharge capacity up to 157.9 mAh·g⁻¹ and superior capacity retention of 89.04% after 100 cycles. Therefore, the HPPS separator has extraordinary potential to be used in high-performance lithium-ion.Octaphenyl-POSS in Pakistan Imported and high-purity, suitable for innovative projects and chemical studies in Pakistan.Imported and high-purity, suitable for innovative projects and chemical studies in Pakistan.

1 Names and Identifiers

2.1Computed Descriptors

InChIKey

KBXJHRABGYYAFC-UHFFFAOYSA-N

Computed by InChI 1.0.6 (PubChem release 2021.10.14)

SMILES

C1=CC=C(C=C1)[Si]23O[Si]4(O[Si]5(O[Si](O2)(O[Si]6(O[Si](O3)(O[Si](O4)(O[Si](O5)(O6)C7=CC=CC=C7)C8=CC=CC=C8)C9=CC=CC=C9)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1

Computed by OEChem 2.3.0 (PubChem release 2021.10.14)

InChI

InChI=1S/C48H40O12Si8/c1-9-25-41(26-10-1)61-49-62(42-27-11-2-12-28-42)52-65(45-33-17-5-18-34-45)54-63(50-61,43-29-13-3-14-30-43)56-67(47-37-21-7-22-38-47)57-64(51-61,44-31-15-4-16-32-44)55-66(53-62,46-35-19-6-20-36-46)59-68(58-65,60-67)48-39-23-8-24-40-48/h1-40H

Computed by InChI 1.0.6 (PubChem release 2021.10.14)

IUPAC Name

1,3,5,7,9,11,13,15-octakis-phenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.1^3,9.1^5,15.1^7,13]icosane

Computed by Lexichem TK 2.7.0 (PubChem release 2021.10.14)

2.2 Molecular Formula

C₄₈H₄₀O₁₂Si₈

Computed by PubChem 2.2 (PubChem release 2021.10.14)

2.3 Other Identifiers

2.3.1 CAS

5256-79-1

CAS Common Chemistry; ChemIDplus; EPA Chemicals under the TSCA; EPA DSSTox

2.3.2 Deprecated CAS

77036-59-0

ChemIDplus

2097451-85-7, 77036-59-0

EPA Chemicals under the TSCA

2.3.3 DSSTox Substance ID

DTXSID00893550

EPA DSSTox

2.3.4 Nikkaji Number

J1.657.056G

Japan Chemical Substance Dictionary (Nikkaji)

2.3.5 Wikidata

Q72497458

Wikidata

2.4.1 Depositor-Supplied Synonyms

1. Octaphenylsilsesquioxane
2. 5256-79-1
3. Perphenyloctasilsesquioxane
4. PSS-Octaphenyl substituted
5. Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, octaphenyl-
6. Octaphenyloctasilsesquioxane
7. 1,3,5,7,9,11,13,15-Octaphenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15- octasilapentacyclo[9.5.1.13,9.15,15.17,13]icosane
8. 1,3,5,7,9,11,13,15-octakis-phenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.13,9.15,15.17,13]icosane
9. Pentacyclo(9.5.1.13,9.15,15.17,13)octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-
10. Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, 1,3,5,7,9,11,13,15-octaphenyl-
11. 1,3,5,7,9,11,13,15-octaphenyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]icosane
12. Octaphenyl-T8-silsesquioxane

13.Octaphenyl-POSS

14. 
    DTXSID00893550
15. AKOS015903488
16. DS-9697
17. Silsesquioxane, phenyl-, cubical octamer
18. O0349
19. I10273
20. 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxane
21. 1,3,5,7,9,11,13,15-Octaphenylpentacyclo[9.5.1.1^3,9^.1^5,15^.1^7,13^]octasiloxane

OCTAPHENYLPENTACYCLO[9.5.1.1(3),?.1?,(1)?.1?,(1)(3)]OCTASILOXANE

22. 
    MFCD00308870
23. Ctaphenylsilsesquioxane
24. Ctaphenylctasilsesquioxane
25. Octaphenyl Silsesquioxane
26. Pss-Ctaphenyl Substituted
27. Octaphenyl-POSS, 98%
28. Ctaphenyl-T8-Silsesquioxane
29. Octaphenylsilsesquioxane POSS
30. Octaphenylhexacyclooctasiloxane
31. Ctaphenylctasilsesquioxane, 95%
32. SCHEMBL15400528

2. Section snippets

Materials

The Poly-m-phenylene isophthalamide (PMIA) (25 wt%, Mw = 1.32 × 10⁵) was purchased from Yantai Spandex Co. Ltd., China. N,N-Dimethylacetamide (DMAc) (99.5%, Mw = 87.12) was supplied by Tianjin Kermel Chemical Reagent Co. Ltd, China. Octaphenyl-POSS nanoparticles (OPS) (98.5%, Mw = 1033.51) were provided by Aladdin, China. The adopted electrolyte was purchased from New Materials of Guo Tai Hua Rong (Zhangjiagang, China), which was obtained by dissolving 1 mol/L LiPF₆ into the mixture solution of …

Morphology

The SEM and diameter distribution images of O0, O1, O2 and O3 nanofiber membranes were shown in Fig. 3. It was clearly observed that all nanofiber membranes exhibited a stable three-dimensional network structure without bead formation. From Fig. 3a–d, it can be seen that the addition of OPS was conducive to reducing nanofiber diameter and was beneficial to the uniform distribution of fiber diameter. As shown in Table 1, the average fiber diameter (AFD) of the hybrid PMIA/Octaphenyl-POSS (HPPS)…

3. EPA DSSTox Classification

[TSCA_ACTIVE_NCTI_0320] TSCA Active Inventory non-confidential portion (updated March 20th 2020).

Short_Description: The Toxicity Values database is delivered via the Hazard Tab in the CompTox Chemicals Dashboard.

Long_Description: The Toxicity Values database is delivered via the Hazard Tab in the CompTox Chemicals Dashboard. As of August 2018 the ToxVal Database contains the following data: 772,721 toxicity values from 29 sources of data, 21,507 sub-sources, 4585 journals cited and 69,833 literature citations.

[TSCA_ACTIVE_NCTI_0320] TSCA Active Inventory non-confidential portion (updated March 20th 2020).

Long_Description: Section 8 (b) of the Toxic Substances Control Act (TSCA) requires EPA to compile, keep current and publish a list of each chemical substance that is manufactured or processed, including imports, in the United States for uses under TSCA. Information about what types of substances are on the TSCA inventory can be found here.

The Toxic Substances Control Act (TSCA), as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act, requires EPA to designate chemical substances on the TSCA Chemical Substance Inventory as either “active” or “inactive” in U.S. commerce. To accomplish this, EPA finalized a rule requiring industry reporting of chemicals manufactured (including imported) or processed in the U.S.. This reporting is used to identify which chemical substances on the TSCA Inventory are active in U.S. commerce and help inform the prioritization of chemicals for risk evaluation.

The list contained in the dashboard includes the active TSCA inventory based on notifications through Feb. 7th 2018 and substances reported from Feb 8, 2018 – March 30, 2018 that have been unambiguously mapped to DSSTox using CASRN and chemical names.

The curation of the non-confidential portion of active TSCA inventory is an ongoing process involving trained chemists to validate the correctness of DSSTox structural and identifier data.

The content of the list will change over time as the non-confidential active TSCA inventory is updated and more substances are curated. (Updated March 20th 2020)

[TSCA_ACTIVE_NCTI_0821] TSCA Active Inventory non-confidential portion (updated August 20th 2021)

Short_Description: TSCA Active Inventory non-confidential portion (updated August 20th 2021). The content of the list will change over time as both the non-confidential active TSCA inventory is updated and more substances are curated.

Long_Description: Section 8 (b) of the Toxic Substances Control Act (TSCA) requires EPA to compile, keep current and publish a list of each chemical substance that is manufactured or processed, including imports, in the United States for uses under TSCA. Information about what types of substances are on the TSCA inventory can be found here.

The Toxic Substances Control Act (TSCA), as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act, requires EPA to designate chemical substances on the TSCA Chemical Substance Inventory as either “active” or “inactive” in U.S. commerce. To accomplish this, EPA finalized a rule requiring industry reporting of chemicals manufactured (including imported) or processed in the U.S.. This reporting is used to identify which chemical substances on the TSCA Inventory are active in U.S. commerce and help inform the prioritization of chemicals for risk evaluation. (Updated August 20th 2021)

[TSCA_ACTIVE_NCTI_0221] TSCA Active Inventory non-confidential portion (updated February 3rd 2021)

Short_Description: TSCA Active Inventory non-confidential portion (updated February 3rd 2021). The content of the list will change over time as both the non-confidential active TSCA inventory is updated and more substances are curated.

Long_Description: Section 8 (b) of the Toxic Substances Control Act (TSCA) requires EPA to compile, keep current and publish a list of each chemical substance that is manufactured or processed, including imports, in the United States for uses under TSCA. Information about what types of substances are on the TSCA inventory can be found here.

The Toxic Substances Control Act (TSCA), as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act, requires EPA to designate chemical substances on the TSCA Chemical Substance Inventory as either “active” or “inactive” in U.S. commerce. To accomplish this,

 EPA finalized a rule     requiring industry reporting of chemicals manufactured (including imported) or processed in the U.S..

 This reporting is used to identify which chemical substances on the TSCA Inventory are active in U.S. commerce and help inform the prioritization of chemicals for risk evaluation. 

The list contained in the dashboard includes the active TSCA inventory based on notifications through Feb. 7th 2018 and substances reported from Feb 8, 2018 – March 30, 2018 that have been unambiguously mapped to DSSTox using CASRN and chemical names. 

The curation of the non-confidential portion of active TSCA inventory is an ongoing process involving trained chemists to validate the correctness of DSSTox structural and identifier data. The content of the list will change over time as the non-confidential active TSCA inventory is updated and more substances are curated. (Updated February 3rd 2021)

[TSCA_ACTIVE_NCTI_0222] TSCA Active Inventory non-confidential portion (updated March 23rd 2022)

Short Description: TSCA Active Inventory non-confidential portion (updated March 23rd 2022). The content of the list will change over time as both the non-confidential active TSCA inventory is updated and more substances are curated.

Long_Description: Section 8 (b) of the Toxic Substances Control Act (TSCA) requires EPA to compile, keep current and publish a list of each chemical substance that is manufactured or processed, including imports, in the United States for uses under TSCA. Information about what types of substances are on the TSCA inventory can be found here.

  The Toxic Substances Control Act (TSCA), as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act, requires EPA to designate chemical substances on the TSCA Chemical Substance Inventory as either “active” or “inactive” in U.S. commerce. To accomplish this, EPA finalized a rule requiring industry reporting of chemicals manufactured (including imported) or processed in the U.S.. This reporting is used to identify which chemical substances on the TSCA Inventory are active in U.S. commerce and help inform the prioritization of chemicals for risk evaluation. (Updated March 23rd 2022)

EPA Substance Registry Services Tree

Chemical Abstracts Index Name

CA Index :: The Chemical Abstracts Services (CAS) Registry File is a chemical structure and dictionary database containing unique records for chemical substances that have been published. All substance records are assigned a unique CAS Registry Number and a Chemical Abstracts (CA) index name. The records may also contain additional information, such as other names, molecular formulas, and structure diagrams related to the specific substance. The CA Index name is used as the name source in CRS when an 8th or 9th CI name is not available.

2016 CDR TSCA Inv

This list contains chemicals that are found on the TSCA Inventory as of June 1, 2016, which is the first day of the reporting period for the 2016 Chemical Data Reporting (CDR). TSCA requires EPA to compile, keep current, and publish a list of each chemical that is manufactured (including imported) or processed in the U.S. for uses under TSCA. Companies that manufacture (including import) chemicals at certain volumes in the U.S. must report to EPA every four years through its CDR, and reporting requirements for the 2016 CDR are based upon the status of a chemical in terms of being subject to certain regulations on June 1, 2016. This list contains CASRNs and accession numbers.

2020 CDR TSCA Inv Active

This list contains CASRN chemicals that are considered Active on the TSCA Inventory. TSCA requires EPA to compile, keep current, and publish a list of each chemical that is manufactured (including imported) or processed in the U.S. for uses under TSCA. Companies that manufacture (including import) chemicals at certain volumes in the U.S. must report to EPA every four years through its Chemical Data Reporting (CDR). Reporting requirements for the 2020 CDR are based upon the status of a chemical in terms of being subject to certain regulations on June 1, 2020, which is the first day of the reporting period for the 2020 CDR.

TSCA Commenced PMN

indicates a commenced PMN substance.

TSCA Inventory

TSCA Inv :: The Toxic Substances Control Act (TSCA) was enacted by Congress in 1976 and amended in 2016, and provides EPA authority to regulate certain new and existing chemicals commercialized in the United States for non-exempt purpose. Section 8(b) of TSCA requires EPA to compile, keep current, and publish a list of each chemical substance that is commercialized in the US for a TSCA use. The original TSCA Inventory was published in 1979 and included chemicals existing in US commerce at the time TSCA was first enacted. New chemicals are added to the Inventory when a Notice of Commencement is received for chemicals reported to the EPA under TSCA Section 5 through the Pre-Manufacture Notification (PMN) process.

4.

Question

1. What is the use of Poss?

The use of POSS in personal care formulations is a new and safe way to achieve hydration, transfer resistance, durability and supple textures, without the inconvenience of formulation complexity.Octaphenyl-POSS in Pakistan is available with discount.

2. What is the full form of DMT chemical?

N,N-Dimethyltryptamine

N,N-Dimethyltryptamine (DMT) is a plant-based hallucinogen that is outlawed in most countries; but researchers are exploring its possible use as an antidepression drug.17-Sept-2018

3. Is poss a polymer?

Polyhedral oligomeric silsesquioxane (POSS) is a macromolecule consisting of an inorganic Si-O cage and bulky organic groups surrounding this inorganic core. Most POSS monomers have one reactive organic substituent to allow for grafting onto a polymer backbone.

4. What is the size of Poss?

POSS molecules are nanoscopic in size. A typical POSS cage has a diameter of 1.5 nanometers. The overall diameter of the molecule ranges from 1-3 nanometers if the organic substitutes are included. Unlike nanoscopic fillers, POSS molecules can have different physical forms such as crystalline solids, waxes, liquids.

5. What is the smallest chemical unit of life?

A cell is the smallest unit of life made up of non-living…

Soil is made up of two main components–one that comes from living things and the other from non-living things. …

Cell is the smallest unit of a living organism.

Non-living components of cells are referred to as.

Assertion :Organisms are made up of cells.

5. The Influence of Octaphenyl POSS Addition on the Electro-aging Characteristics of Polypropylene

Xiaosi Lin1, 2 , Chuanjie Lin5 , Wah Hoon Siew2 , John Liggat3 , Martin Given2 , Jinliang He4 1 State Grid Fujian Technical Training Centre, State Grid Fujian Electric Power Co., Ltd., 362013, China (Since Jul. 2022) 2Department of Electronic and Electrical Engineering, University of Strathclyde, G1 1XW, UK 3Department of Pure and Applied Chemistry, University of Strathclyde, G1 1XL, UK 4State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, 362013, China 5 State Grid Fuzhou Power Supply Company, State Grid Fujian Electric Power Co., Ltd., 350004, China.

Compared with inorganic nanofillers, POSS has attracted attention due to its special structure. The chemical bonds of Si-O-Si build the main cage of POSS and each corner is connected with a side-group. As shown in Fig. 1, the main cage of OpPOSS can perform as a nano-silica to improve the electrical properties of polymers [10] while the eight phenyl groups connected to the corners introduce the polar group.  Octaphenyl-POSS in Pakistan  a premium-grade additive to enhance your chemical experiments and polymer formulations in Pakistan.

In this paper, OpPOSS/PP nanocomposites were subjected to electrothermal ageing under an electric field of 30 kV/mm and a temperature of 110℃. The electrical properties of aged samples were tested after 5, 10, 15, 20, 25 and 30 days. It was found that the addition of OpPOSS/PP could enhance the aging characteristics and operational lifespan of PP.

MATERIALS AND EXPERIMENTS

1.      Materials

The matrix material, isotactic polypropylene (iPP) and the nanofiller, OpPOSS were purchased from Aladdin Industrial Inc., China. The density of iPP and OpPOSS nanofillers are 0.92 g/cm3 and 1.25 g/cm3 respectively. Xylene used was also provided from Aladdin Industrial Inc., China

2.      Nanocomposites preparation

The pellets of PP and 2.0 phr OpPOSS nanofiller were dispersed and blended in xylene at a temperature of 120 ℃. After even mixing was achieved, the solution of OpPOSS/PP/xylene were dried at 100℃ in the drying box.

The resulting 2.0 phr OpPOSS/PP nanocomposites powder was then placed in moulds and pressed under 15 MPa and 200℃ for 15 min, then cooled down to room temperature under the pressure of 10 MPa within 5 min. The samples were then placed in a vacuum oven at 60 ℃ for 2 hours to remove the moisture on the surface of samples This allowed the manufacture of nanocomposite samples with thickness of 100 and 200 μm.

3.      Electro-thermal aging process design

The system used to electrothermally stress the 100 and 200 μm. samples of PP and its nanocomposites is shown in Fig. 2. The ageing was carried out in a vacuum oven. In a practical DC cable, the maximum operational temperature and DC electric field would be limited t0 70 ℃ and 15 kV/mm respectively. In this research, the temperature of electrothermal aging process was set to 110℃ and the electric field was adjusted to 30 kV/mm in order to accelerate the aging process of PP and nanocomposites.

In addition, there were no antioxidants in the manufactured samples while in a practical cable antioxidants are added into insulation layer to delay the aging process of the insulation materials.

4.      The experimental design for lifespan estimation

The DC system shown in Fig. 3 was designed to measure the time to failure of aged PP and OpPOSS/PP nanocomposites under a field of 60 kV/mm, a temperature of 110 ℃ a pressure of 0.01 Pa. The duration time until the breakdown occurred was recorded to estimate the lifespan of samples.

EXPERIMENTAL RESULTS AND ANALYSIS

1.      Thermally stimulated depolarized current (TSDC) result

The damage of the samples mainly came from electrical stress rather than through reactions the oxidation. Therefore, the results showed that the electrical damage of PP in the aging process is decreased by the addition of OpPOSS.

2.      SEM observation

The surface microstructure of PP and 2.0 phr OpPOSS/PP nanocomposites shown in Fig. 5 and Fig. 6. after being subjected to electro-thermal aging process for differing times days were observed using SEM techniques. Cracks of different severity appeared on the surface of the aged samples after electro-thermal aging process.

The surface roughness of PP increased with the increase of aging time. After 15 days of electro-thermal aging obvious cavities began to appear, and the deterioration of PP surface began to become more marked with the increase of time.

Although the cracks on the surface of OpPOSS/PP nanocomposites became more serious with the increase of electro-thermal aging time, the surface roughness and deterioration degree were lower than that of PP. Because PP and OpPOSS/PP nanocomposites were aged in a vacuum oven, and the upper and lower surfaces of the samples are covered by electrodes,

3.      DC breakdown strength

The DC breakdown strength of aged PP and OpPOSS/PP nanocomposites after the electro-thermal aging process are shown in Fig. 7 by fitting to a 2-parameter Weibull distribution and the Weibull parameters are shown in Fig. 8 [13]. The critical value E0 and the shaping factor β of breakdown strength were used to describe the breakdown strength of samples with the breakdown probability of 63.2% and the dispersion of breakdown strength respectively.

CONCLUSION

The addition of OpPOSS nanofillers is aimed to improve the long-term performance of the base PP insulation material. The improvements to electro-thermal aging characteristics have been investigated. The results indicated the introduction of deep traps could capture the mobile charges then build the potential barrier so that the charge injection and charge transportation could be suppressed. Therefore, the electrical damage would be reduced during the operation, finally the lifespan of PP could be enhanced.Octaphenyl-POSS in Pakistan Perfect for high-performance polymer and nanomaterial research.