线性热硫化聚单苯基硅氧烷可控合成及性能研究  

Controlled polymerization and properties of linear heat vulcanizing polysinglephenylsiloxane

作　　者：史东林[1] 舒远杰[2] 余凤湄[2] 芦艾[2] 罗世凯[2] 邓志华[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《功能材料》2013年第10期1442-1446,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51173174);中国工程物理研究重点基金资助项目(2010B0302038)

摘　　要：设计并合成了重均分子量>6.5×105g/mol的线性聚单苯基硅氧烷(HP-1),用傅立叶红外(FT-IR)、固体核磁(29Si SS-NMR)、液体核磁(1H NMR)、凝胶渗透色谱(GPC)表征HP-1分子结构,并用示差扫描量热法(DSC)和旋转流变(RS)测试HP-1的低温热性能和高温流变性能。研究结果表明,HP-1的苯基、乙烯基的摩尔分数分别为9.98%、0.997%,重均分子量为8.23×105g/mol,与设计值相吻合;HP-1的玻璃化转变温度Tg=-119.85℃,为非结晶性聚合物;在T≤250℃时,其结构稳定,保持高弹态,并且在T≤250℃、ω<7.7rad/s时,具有良好的阻尼特性。The high molecular weight （Mw 〉6.5 ）×10^5 g/mol） polysinglephenylsiloxane （HP-1） was designed and synthesized in this paper. The molecular structure of HP-1 was characterized by Fourier transform infrared spectrometer （FT-IR）, solid-state nuclear magnetic resonance （29Si SS-NMR） and liquid nuclear magnetic reso- nance （1H NMR）. Low temperature thermal property and high temperature rheological properties of HP-1 were studied by differential scanning calorimetry （DSC） and rotational rheology （RS）. The results showed that the vinyl group and phenyl group content and molecular weight of HP-1 are 0. 997mol%, 9. 98mol% and 8.23 X 105g/mol, which coincided with the designed values. HP-1 belonged to the class of non-crystalline polymer with glass transition temperature --119.85 ℃, and it possessed excellent stability and elastic under 250C. In addition, HP-1 had outstanding damping property at T ≤ 250℃and ω〈7.7md/s.

关 键 词：聚单苯基硅氧烷 聚合 表征 性能 

分 类 号：O631[理学—高分子化学]