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首页> 外文期刊>Materials science forum >Synthesis and Properties of Phenyl Silicone Resin Reinforced Addition Type Liquid Phenyl Silicone Rubber
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Synthesis and Properties of Phenyl Silicone Resin Reinforced Addition Type Liquid Phenyl Silicone Rubber

机译：苯基硅树脂增强加成型液态苯基硅橡胶的合成与性能

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摘要

Phenyl silicone resin reinforced addition type liquid phenyl silicone rubber was prepared by vulcanization of vinyl end-capped polymethylphenylsiloxane (PVPS), phenyl MT resins and hydrogen end-capped polydiphenylsiloxane (PHPS) under Pt catalysis at 150°C for 4h. The effects of the proportion and the vinyl content of phenyl MT resins on the mechanical properties of cured products were investigated. The thermal stability was explored by thermogravimetric analysis. The changes of mechanical properties were also studied before and after irradiation. Phenyl silicone rubber with good performance was obtained when the phenyl MT resin content was 50~60 wt% and the vinyl content was at 5.5~6.6 wt%. The onset temperature of thermal degradation and the center temperature of thermal degradation were 443.7°C and 502°C, respectively. When the radiation dose increased from 0 to 300 KGy, the tensile strength decreased from 4.1MPa to 2.3MPa and the tearing strength decreased from 8.9MPa to 5.1MPa. When the radiation dose continues to increased from 300 to 900 KGy, the tensile strength increased from 2.3MPa to 6.4MPa and the tearing strength increased from 5.1MPa to 6.5MPa. During the process of radiation, the elongation at break had been kept down from 96% to 52%, and the hardness increased from 80A to 90A.
机译：苯甲基硅树脂增强的加成型液态苯基硅橡胶是通过将乙烯基封端的聚甲基苯基硅氧烷（PVPS），苯基MT树脂和氢封端的聚二苯基硅氧烷（PHPS）在150℃的Pt催化下硫化4小时而制得的。研究了苯基MT树脂的比例和乙烯基含量对固化产物力学性能的影响。通过热重分析探讨了热稳定性。还研究了辐照前后的机械性能变化。当苯基MT树脂含量为50〜60 wt％，乙烯基含量为5.5〜6.6 wt％时，可获得性能良好的苯基硅橡胶。热降解的起始温度和热降解的中心温度分别为443.7℃和502℃。当辐射剂量从0增加到300 KGy时，拉伸强度从4.1MPa降低到2.3MPa，撕裂强度从8.9MPa降低到5.1MPa。当辐射剂量从300KGy继续增加到900KGy时，抗拉强度从2.3MPa增加到6.4MPa，撕裂强度从5.1MPa增加到6.5MPa。在辐射过程中，断裂伸长率从96％降低到52％，硬度从80A增加到90A。

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