A novel epoxy-functionalized hyperbranched polysiloxane (HPSi) endowing methyl phenyl silicone resin (Si603)/epoxy systems with enhanced compatibility and fire retardancy performance

Jia, Pei; Liu, Hanchao; Wang, Youchuan; Cai, Xufu

doi:10.1039/c5ra18399e

Cited by 28 publications

(22 citation statements)

References 28 publications

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“…Accordingly, the blended coating had outstanding heat resistance . Compared with thermal performance of the epoxy/methylphenyl silicone resin composites reported in recent literatures, thermal stability (the weight loss temperatures at 5 wt%) of blending composites only reached to 310°C to 380°C . Figure displays the differential TGA curves of cured PSi/FR.…”

Section: Resultsmentioning

confidence: 86%

“…The catalyst enhanced the activity of hydrogen atom, so Si―OH tended to interact with the aldehyde end of FR, allowing self‐cross‐linking through the condensation reaction of PSi . When the temperature was higher than 200°C, PSi partly underwent dehydrogenation and condensation reaction between silicon hydride and silicon hydrogen in the presence of the catalyst . When the temperature is below 200°C, the hydroxyl‐aldehyde condensation reaction occurs between aldehyde group in furan and hydroxyl group in methyl phenyl silicone, which followed by further reaction between two hydroxyl groups coming from furan and methyl phenyl silicone, which both build up covalent linkages between PSi and FR networks.…”

Section: Resultsmentioning

confidence: 99%

“…The 5 wt% weight loss temperature (T 5% ) of the best heat‐resistant curing system reached 325°C in N 2 atmosphere, and the highest char yield reached 27.2% at 600°C. Jia et al produced a hyperbranched polysiloxane to improve the compatibility of PSi and epoxy resin blends. As a result, T 5% of cured product of the blended system under N 2 atmosphere was 376.2°C, and the char yield at 800°C was 29.22%.…”

Section: Introductionmentioning

confidence: 99%

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Curing mechanism, heat resistance, and anticorrosion properties of a furan/methyl phenyl silicone coating

Zhang

Shi

et al. 2018

Polymers for Advanced Techs

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A coating composed by methyl phenyl silicone resin (PSi) and furan resin (FR) was prepared, and its curing mechanism, heat resistance, and anticorrosion properties were investigated by Fourier transform infrared spectroscopy, thermogravimetric analysis, electrochemical test, and chemical resistance test. Aldol condensation reaction between FR and PSi occurred at below 200°C, and PSi underwent self‐multidehydrogenation at above 200°C. These curing reactions gave excellent thermal stability and anticorrosion properties. Compared with pure PSi, the blended containing lower than 20 wt% FR had better thermal properties, manifested as over 390°C of 5 wt% weight loss temperature and over 40% of char yield at 800°C. The adhesion property of cured blended system on the metal surface reached the first level which exceeded that of pure PSi coating (the third level). Furthermore, the corrosion resistances of coating in acid, alkali, and salt environments were all improved compared with those of monomeric polymer coating. The impedance of blended coating in 3.5% NaCl solution decreased with increasing FR content, which was 1.8 × 106 Ω cm2 when the FR content was 40%, being higher than that of pure PSi coating (7.12 × 105 Ω cm2). This was mainly due to the formation of a cross‐linked network structure based on Si―O―C bond and the enhanced adhesion of cured blended coating. In addition, the surface roughness of cured blended coating was below 2.0 μm, which may have a positive effect on drag reduction in real applications.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Curing mechanism, heat resistance, and anticorrosion properties of a furan/methyl phenyl silicone coating

Zhang

Shi

et al. 2018

Polymers for Advanced Techs

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“…The released smoke during the material combustion is one of the most significant factors because most casualties in fires were caused by asphyxia . Thus, the smoke suppression is required for flame‐retardant polymer.…”

Section: Resultsmentioning

confidence: 99%

Preparation of a novel phosphorus‐containing organosilicon and its effect on the flame retardant and smoke suppression of polyethylene terephthalate

Peng

Xue

Song

et al. 2019

Polymers for Advanced Techs

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A novel phosphorus‐containing silicone flame retardant (PDPSI) was prepared by Mannish reaction, and a series of PDPSI/PET composites were prepared by melt blending method. The nuclear magnetic resonance (1H NMR), Fourier transformation infrared (FTIR), and the thermogravimetric analyzer (TGA) results indicated that PDPSI showed network structure and owned good thermal stability, with the char residue of 62.2% at 800°C. The flame retardancy of PDPSI/PET composites was characterized by limiting oxygen index (LOI), vertical burning tests (UL‐94), and cone calorimeter (CCT). The results revealed that the addition amount of PDPSI was 5%, the LOI value of PDPSI/PET composites increased to 27.3%, and UL‐94 test passed V‐0 rating. When the PDPSI loading was 3%, PET composites showed excellent flame retardancy and smoke suppression, with a decrease in the peak heat release rate (PHRR) by 71.19% and the total smoke release (TSP) reduced from 14.4 to 11.1m2. The scanning electron microscopy (SEM) and FTIR results of char residue demonstrated that the flame‐retardant mechanism of PDPSI was solid phase flame retardant. PDPSI catalyzed the aromatization reaction of PET to promote the formation of a dense and continuous carbon layer, finally improving the flame retardancy and smoke suppression properties of PET.

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“…As the content of HBPSi increases, the maximum mass loss rate of the samples decreases stepwise, which is attributed to the thermal insulation effect of siliconecontaining chains. 49,50 As the HBPSi-2 content increases to 5%, T i and T max increase due to the more stable structure derived from the increased crosslinking density and higher content of aromatic ring. However, as the HBPSi-2 content increases to 15%, T i and T max decrease because of the incomplete curing.…”

Section: Thermal Stabilitymentioning

confidence: 99%

Simultaneous reinforcement and toughness improvement of an epoxy–phenolic network with a hyperbranched polysiloxane modifier

et al. 2018

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An epoxy-phenolic network is modified with hyperbranched polysiloxane (HBPSi). The addition of HBPSi-2, which has medium molecular weight, can significantly decrease the viscosity of the uncured epoxyphenolic system and increase the crosslinking density and homogeneity of the cured crosslinking network. With 10% HBPSi-2, the mechanical properties of the samples are improved comprehensively: tensile modulus and maximum strength increase by 11.4% and 36.2%, respectively, while elongation at break and impact strength increase by 153.8% and 186.7%, respectively. The comprehensive improvements in the mechanical properties are attributed to combined effects of crosslinking density, network rigidity, cohesive density and the matrix-modifier compatibility. What is more, HBPSi-2 also significantly increases the char yield of the material and decreases the thermal weight loss rate, indicating an improved thermal stability. All these results may provide a new strategy for toughness and strength improvement of the epoxy-phenolic network.

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A novel epoxy-functionalized hyperbranched polysiloxane (HPSi) endowing methyl phenyl silicone resin (Si603)/epoxy systems with enhanced compatibility and fire retardancy performance

Abstract: A novel hyperbranched polysiloxane (HPSi) with a great amount of epoxy groups was synthesized as a compatibilizer of epoxy resin (EP)/methyl phenyl silicone resin (Si603) blends.

Cited by 28 publications

References 28 publications

Curing mechanism, heat resistance, and anticorrosion properties of a furan/methyl phenyl silicone coating

Curing mechanism, heat resistance, and anticorrosion properties of a furan/methyl phenyl silicone coating

Preparation of a novel phosphorus‐containing organosilicon and its effect on the flame retardant and smoke suppression of polyethylene terephthalate

Simultaneous reinforcement and toughness improvement of an epoxy–phenolic network with a hyperbranched polysiloxane modifier

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