橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2010 Vol.33 No.2 P.97-100

 橡胶技术网

聚苯乙烯增强室温硫化硅橡胶的制备及表征

董建　 张乃强　 刘宗林　

摘　要：以过氧化苯甲酰为引发剂,使苯乙烯在α,ω-羟基聚(二甲基-甲基乙烯基)硅氧烷(PDM-MVS)中进行自由基聚合,制备了PDM-MVS/聚苯乙烯(PS)共混物.将该共混物在室温下进行硫化,获得了PS增强的室温硫化硅橡胶,并对硅橡胶的力学性能和微观形态进行了表征.结果表明,目标硅橡胶的拉伸强度和扯断伸长率均随PDM-MVS中乙烯基质量分数的增加而增大,当乙烯基质量分数为1.50%时,其拉伸强度达3.9 MPa,扯断伸长率达416%,PS的增强效果明显;目标硅橡胶具有微相分离结构,PS作为分散相均匀分布于PDM-MVS连续相中,两相的相容性随着PDM-MVS中乙烯基质量分数的增加而增强.
关键词：α,ω-羟基聚(二甲基-甲基乙烯基)硅氧烷;聚苯乙烯;共混物;室温硫化;硅橡胶;力学性能;微相分离
分类号：TQ333.93　文献标识码：A
文章编号：1000-1255(2010)02-0097-04

Preparation and characterization of room temperature vulcanized silicone rubber reinforced by polystyrene

Dong Jian（School of Chemistry and Chemical Engineering, Taishan Medical University, Taian 271000, China）　 Zhang Naiqiang（School of Chemistry and Chemical Engineering, Taishan Medical University, Taian 271000, China）　 Liu Zonglin （School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China）　

Abstract：α,ω-dihydroxy-poly(dimethyl-methylvinyl)siloxane/polystyrene (PDM-MVS/PS) blends were prepared by radical polymerization of styrene in the presence of PDM-MVS, using benzoyl peroxide as initiator. Room temperature vulcanized silicone rubbers reinforced by PS were prepared by vulcanizing the PDM-MVS/PS blends at room temperature. The mechanical properties and microphase structure of the silicone rubbers were studied. The results showed that the tensile strength and elongation at break of the objective silicone rubber increased with the increase of vinyl content in PDM-MVS. The tensile strength was 3.9 MPa and elongation at break was 416%, and the reinforcement effect of PS on silicone rubber was significant when the mass fraction of vinyl was 1.50%. The objective silicone rubber had microphase-separated structure consisting of PS domains uniformly dispersed within a continuous PDM-MVS matrix. The compatibility between the two phases increased with the increase of vinyl content in PDM-MVS.
Keywords：α,ω-dihydroxy-poly(dimethyl-methylvinyl)siloxane; polystyrene; blend; room temperature vulcanization; silicone rubber; mechanical property; microphase separation

基金项目：山东省泰山医学院中青年学术骨干重点科研资助项目(zd 023).
作者简介：董建(1976-),女,博士,副教授.已发表论文16篇.
作者单位：董建（泰山医学院,化学与化学工程学院,山东,泰安271000）　
　　　　　张乃强（泰山医学院,化学与化学工程学院,山东,泰安271000）　
　　　　　刘宗林（山东大学,化学与化工学院,山东,济南,250100）　

参考文献：

[1]Baysal B M,Uyanik N,Hamurcu E E,et al.Styrene polymerization with a macrointiator having siloxane units[J].J Appl Polym Sci,1996,60(9):1369-1378.
[2]Boonstra B B.Role of particulate fillers in elastomer reinforcement:A review[J].Polymer,1979,20(3):691-704.
[3]Dong Jian,Liu Zonglin,Han Nianfeng,et al.Preparation,morphology,and mechanical properties of elastomers based on α,ω-dihydroxy polydimethylsiloxane/polystyrene blends[J].J Appl Polym Sci,2004,92(6):3542-3548.
[4]Dong Jian,Liu Zonglin,Cao Xiaoqun,et al.Elastomers based on α,ω-dihydroxy-polydimethylsiloxane/poly-styrene blends:Morphology and mechanical properties[J].J Appl Polym Sci,2006,101(4):2565-2572.
[5]董建,刘宗林.α,ω-羟基聚二甲基硅氧烷和聚苯乙烯共混物的制备、硫化及力学性能研究[J].高分子材料科学与工程,2003,19(6):55-57.
[6]董建,刘宗林,韩念凤,等.α,ω-羟基聚二甲基硅氧烷和交联聚苯乙烯共混物的制备、硫化及力学性能[J].高分子材料科学与工程,2004,20(1):132-134.
[7]Dong Jian,Liu Zonglin,Feng Yongbin,et al.Preparation,morphology,and mechanical properties of elastomers based on α,ω-dihydroxy polydimethylsiloxane/poly(methyl methacrylate) blends[J].J Appl Polym Sci,2006,100(2):1547-1553.

收稿日期：2009年1月13日

修稿日期：2009年12月17日

出版日期：2010年3月15日