以陰離子聚合法製備不同比例之SIS橡膠及其氫化前後之性質研究

Synthesis and Evaluation of Hydrogenated SIS Triblock Copolymers Having Different Monomer Proportions

顏于傑(Yu-Chieh Yen)

指導教授 ： 蔣見超

國立中正大學/工學院/化學工程學系/碩士(2015年)

摘要

本篇論文主要是探討在非極性環境下以陰離子聚合法來合成不同比例(聚苯乙烯含量30%、60%、90%)的三嵌段高分子SIS，分子量以GPC測量分別為60K和90K,合成方式大致為先以二級丁基鋰(sec-Butyllithium)作為起始劑合成聚苯乙烯,再依序加入異戊二烯與苯乙烯單體來合成所需的三嵌段高分子，再進一步將SIS全氫化，將全部雙鍵飽和，形成具有高透光率的CBC，最後由儀器1H-NMR、FTIR來做結構鑑定並計算其氫化轉化率，再由流變儀、DSC、TGA來測量氫化後高分子的物理性質與熱性質變化。

關鍵字

氫化 ； 異戊二烯 ； 苯乙烯 ； 陰離子聚合法

並列摘要

In this study, three different ratios (polystyrene contain 30%,60% and 90%) of triblock copolymer , SIS, are synthesized by anionic polymerization with non-polar solvent and the molecular weight of polymer are 60,000 and 90,000 which are measured by GPC .Polystyrene is synthesized by anionic polymerization with sec-BuLi as the initiator in the first step, then the isoprene and styrene monomer are added sequentially to synthesize the triblock copolymer. In order to form high transmittance CBC, the SIS was hydrogenated to saturate all the double-bond. The structure and the hydrogenation conversion ratio of the polymer can be detected by 1H-NMR and FTIR. Physical properties and thermal properties of polymer after hydrogenation are measured by rheometer, DSC and TGA.

並列關鍵字

hydrogenation ； isoprene ； anionic polymerization ； styrene

參考文獻

[4] Szwarc, M. (1956). Living'polymers. Nature, 178, 1168-1169.

[5] Bauer, B. J., & Fetters, L. J. (1978). Synthesis and dilute-solution behavior of model star-branched polymers. Rubber Chemistry and Technology, 51(3), 406-436.

[6] Graessley, W. W. (1982). Effect of long branches on the temperature dependence of viscoelastic properties in polymer melts. Macromolecules,15(4), 1164-1167.

[7] Grest, G. S., Fetters, L. J., Huang, J. S., & Richter, D. (1996). Star polymers: experiment, theory and simulation. Adv. Chem. Phys, 94, 67.

[8] Milner, S. T. (1994). Chain Architecture and Asymmetry in Copolymer Microphases. Macromolecules, 27(8), 2333-2335.