Greatly improving thermal stability of silicone resins by modification with POSS

Xu, Yaoyuan; Long, Jun; Du, Yunzhe; Guan, Shengjie; Wang, Yuying; Huang, Lingyun; Wei, Hongwei; Liu, Li; Huang, Yudong

doi:10.1016/j.polymdegradstab.2020.109082

Cited by 49 publications

(17 citation statements)

References 30 publications

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“…From the sharp peaks in the XRD spectrum (Figure 2(A)). This peak position is consistent with the literature or standard peak, and OA‐POSS is successfully prepared 38 . Secondly, the 1 H Nuclear Magnetic Resonance Spectroscopy (HNMR) spectrum of OA‐POSS in D 2 O shows three characteristic signals with chemical shifts of 2.95 (a, 2H), 1.72 (b, 2H) and 0.71 ppm (c, 2H), which are well assigned to 3‐aminopropyl (Figure 2(B)).…”

Section: Resultssupporting

confidence: 88%

Applications of GO/OA‐POSS Layer‐by‐Layer self‐assembly nanocoating on flame retardancy and smoke suppression of flexible polyurethane foam

Jia

Cheng

et al. 2021

Polymers for Advanced Techs

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Flexible polyurethane foam (FPUF) is extremely flammable and will release a large number of toxic fumes during the combustion process, which brings great safety hazards. Therefore, a binary hybrid nanocoating composed of graphene oxide (GO) and octaamino polyhedral oligomeric silsesquioxane (OA‐POSS) is deposited on the surface of FPUF through layer‐by‐layer self‐assembly technology, with the aim of enhance the flame retardancy and smoke suppression properties of the hybrid FPUF. Compared with pure FPUF, the peak heat release rate, the total heat release, the peak smoke production rate and the total smoke release of FPUF@GO/OA‐POSS‐6 is decreased by 67.3%, 28.3%, 65.03% and 42.9%, indicating the hybrid FPUF excellent flame retardancy and smoke suppression properties. Compared with pure FPUF, the tensile strength of FPUF@GO/OA‐POSS‐6 is increased by 42%, and after three times of compression, the compressive strength increases by 83.17% on average. Facts have proved that the hybrid effect between GO and OA‐POSS enhances the flame retardancy, smoke suppressive effects, tensile strength and compressive strength of FPUF.

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Section: Resultssupporting

confidence: 88%

Applications of GO/OA‐POSS Layer‐by‐Layer self‐assembly nanocoating on flame retardancy and smoke suppression of flexible polyurethane foam

Jia

Cheng

et al. 2021

Polymers for Advanced Techs

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“…POSS is an oligomer with a chemical structure (RSiO 1.5 )n (N = 6, 8, 10, 12) [ 28 , 29 ]. The POSS structure shows high thermal stability owing to its three-dimensional cage structure [ 30 , 31 ]. On the other hand, the LPSQ structure has a long repeating unit of Si–O–Si and a high molecular weight [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Hard Coating Materials Based on Photo-Reactive Silsesquioxane for Flexible Application: Improvement of Flexible and Hardness Properties by High Molecular Weight

et al. 2021

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EPOSS of polyhedral oligomeric silsesquioxanes (POSS) mixture structure and LPSQ of ladder-like polysilsesquioxane (LPSQ) structure were synthesized via sol–gel reaction. EPSQ had a high molecular weight due to polycondensation by potassium carbonate. The EPSQ film showed uniform surface morphology due to regular double-stranded structure. In contrast, the EPOSS-coated film showed nonuniform surface morphology due to strong aggregation. Due to the aggregation, the EPOSS film had shorter d-spacing (d1) than the EPSQ film in XRD analysis. In pencil hardness and nanoindentation analysis, EPSQ film showed higher hardness than the EPOSS film due to regular double-stranded structure. In addition, in the in-folding (r = 0.5 mm) and out-folding (r = 5 mm) tests, the EPSQ film did not crack unlike the EPOSS coated film.

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“…Polyhedral oligomeric silsesquioxane (POSS), a special type of crystalline silsesquioxane with regular cage-like structures, is often applied as a nanofiller for polymer materials, aiming to improve their mechanical, thermal, and fire retardancy properties. [1][2][3][4][5][6][7] However, though various POSS are commercially available, the cost of POSS remains quite high (one or several US dollar[s] per gram). This highly restricts their real-world applications as nanofillers for commodity polymers, such as polyolefin.…”

Section: Introductionmentioning

confidence: 99%

C30‐45 long‐chain alkyls modified silsesquioxane: A promising additive for polyethylene

Zhang

Fan

et al. 2021

Polymer Composites

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A novel commercial available and inexpensive long-chain alkyl (C30-45) modified silsesquioxane, namely (C30-45 alkyl)dimethylsilyl polypropylsilsesquioxane (C30PSS), was applied as a functional filler for linear low density polyethylene (LLDPE). For comparison, LLDPE/octaisobutyl polyhedral oligomeric silsesquioxane (BuPOSS) nanocomposites were also prepared via melt blending. The chemical and crystalline structures of C30PSS and BuPOSS were first identified by Fourier transform infrared spectroscopy, solid 29 Si NMR, and X-ray diffraction. The dispersion of two fillers in the polymer matrix was analyzed via scanning electron microscopy and X-ray energy dispersive spectroscopy. The rheological, tensile, and thermal properties of pristine LLDPE, LLDPE/C30PSS, and LLDPE/BuPOSS composites were systematically studied. Our results showed that C30PSS can serve as a promising and low-priced filler for LLDPE with respect to its fine dispersion in LLDPE and its abilities to improve the rheological and mechanical properties of LLDPE.

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Greatly improving thermal stability of silicone resins by modification with POSS

Cited by 49 publications

References 30 publications

Applications of GO/OA‐POSS Layer‐by‐Layer self‐assembly nanocoating on flame retardancy and smoke suppression of flexible polyurethane foam

Applications of GO/OA‐POSS Layer‐by‐Layer self‐assembly nanocoating on flame retardancy and smoke suppression of flexible polyurethane foam

Hard Coating Materials Based on Photo-Reactive Silsesquioxane for Flexible Application: Improvement of Flexible and Hardness Properties by High Molecular Weight

C30‐45 long‐chain alkyls modified silsesquioxane: A promising additive for polyethylene

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