Effects of -CH_2CH_2CF_3 on properties of RTV polysiloxane rubber: Processability, thermal stability, and oil/solvent resistance

Li B.; Chen S.; Zhang J.

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Effects of -CH_2CH_2CF_3 on properties of RTV polysiloxane rubber: Processability, thermal stability, and oil/solvent resistance

机译：-CH_2CH_2CF_3对RTV聚硅氧烷橡胶性能的影响：可加工性，热稳定性和耐油/耐溶剂性

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Room temperature vulcanizing fluorosilicone rubbers (FSRs) were prepared from polydimethylsiloxane (PDMS), vinyl fluorosilicone-oil (VFS-oil), and precipitated silica (PDMS/VFS/SiO_2). Rheological tests showed appropriate processing condition could be obtained when shear rate > 10 s~(-1). Mechanical tests indicated that tensile strength and elongation at break were not much affected by VFS-oil and no decline was observed after being aged in 70 °C ASTM 1# oil. The -CF_3 group could not only increase oil-resistance, but also decrease surface energy, which were proved by ATR-FTIR and contact angle tests. The PDMS oil immersion tests showed that the higher the content of VFS-oil, the better oil resistance can be obtained. The solvent-resistance tests indicated that the VFS-oil improved resistance to nonpolar/low-polar solvent. TGA results showed that the increasing content of VFS-oil could slightly decrease FSRs' thermal stability but increase FSRs' residual mass ratio at 790°C.

机译：由聚二甲基硅氧烷（PDMS），乙烯基氟硅油（VFS-油）和沉淀二氧化硅（PDMS / VFS / SiO_2）制备室温硫化氟硅橡胶（FSR）。流变试验表明，当剪切速率> 10 s〜（-1）时，可获得适当的加工条件。力学测试表明，VFS油对拉伸强度和断裂伸长率影响不大，并且在70°C ASTM 1＃油中老化后也未观察到下降。 -CF_3基团不仅可以提高耐油性，而且可以降低表面能，这已通过ATR-FTIR和接触角测试证明。 PDMS油浸测试表明，VFS油含量越高，可获得的耐油性越好。耐溶剂性测试表明，VFS油提高了对非极性/低极性溶剂的抗性。 TGA结果表明，增加VFS油的含量会稍微降低FSR的热稳定性，但会增加790°C下FSR的残余质量比。

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《Journal of Applied Polymer Science》 |2014年第1期|共9页
作者
Li B.; Chen S.; Zhang J.;
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正文语种 eng
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fluorosilicone rubber (FSR); oil resistance; room temperature vulcanizing (RTV); thermal degradation; trifluoropropyl group;

机译：氟硅橡胶（FSR）;耐油性;室温硫化（RTV）;热降解;三氟丙基;

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Effects of -CH_2CH_2CF_3 on properties of RTV polysiloxane rubber: Processability, thermal stability, and oil/solvent resistance

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