摘要
以正硅酸乙酯为原料,采用Stber法制备了Si O2微球,用γ-巯丙基三甲氧基硅烷对其进行处理,制得表面巯基功能化Si O2微球(HS-Si O2),然后以其为增强剂、1,3,5-三巯基-2,4,6-均三嗪(TCY)为硫化剂,制备了氯化聚乙烯(CPE)硫化胶,通过透射电子显微镜、傅里叶变换红外光谱及X射线能谱仪表征了HS-Si O2,分别采用硫化仪法和非等温差示扫描量热(DSC)法分析了CPE/TCY/HSSi O2体系的硫化动力学行为,并研究了CPE硫化胶的拉伸性能。结果表明,HS-Si O2是一种单分散的微球,形状大小都很规整,粒径约为200 nm,其表面主要含有Si、S、O等元素;硫化仪法测得体系的反应活化能(Ea)为71.94 k J/mol,DSC法测得体系的Ea为72.02 k J/mol,结果基本一致,说明HS-Si O2对CPE的硫化具有明显的促进作用;HS-Si O2也有利于提高CPE硫化胶的拉伸性能。
Using tetraethoxysilane as raw materi- als, SiO2 microspheres were fabricated via Stt^ber method, the thiol-functionalized SiO2 microspheres （ HS-SiO2） were prepared by modifying the prepared microspheres with T-mercaptopropyhrimethoxysi- lane, and the chlorinated polyethylene （CPE） vul- canizates was obtained with HS-SiO2 as reinforcing agent, 1 , 3,5-trithiol -2,4,6-triazine （ TCY ） as cu- ring agent. The microstructure of HS-SiO2 was characterized with Fourier transform infrared spectrome- ter, transmission electron microscope and X-ray en- ergy spectrometer. The vulcanization kinetic behav- ior of CPE/TCY/HS-SiO2 system was studied by both cure-meter method and differential scanning calorimetry（DSC） method at different temperatures. The results showed that the HS-SiO2 was regular, monodispersed microspheres with size about 200 nm and Si, S, O elements on their surface. The reac- tion activity energy calculated by cure-meter method and DSC was 71.94 kJ/mol and 72.02 kJ/mol re- spectively, indicating the results were basically con- sistent and HS-SiO2 particles promoted the vulcanization of CPE/TCY, further more, improved the tensile properties.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2015年第6期427-432,共6页
China Synthetic Rubber Industry
