以陰離子聚合法合成等嵌段苯乙烯-丁二烯SBSBS共聚物及其氫化前後性質研究

Preparation of SBSBS Rubber via Anionic Polymerization and Compare the Properties after Hydrogenation

蕭詠泰(HSIAO YUNG-TAI)

指導教授 ： 蔣見超

國立中正大學/工學院/化學工程學系/碩士(2016年)

摘要

本論文探討以陰離子聚合法聚合目標高分子，在非極性環境下使用二級丁基鋰作為起始劑，利用活性陰離子聚合法合成苯乙烯系列嵌段共聚物，在目標高分子中以聚苯乙烯為其硬質段，聚丁二烯為軟質端段，並且改變苯乙烯佔整體中的比例如30%、60%、85%來合成三嵌段及五嵌段的SBSBS高分子，後透過全氫化反應使其苯環以及丁二烯上的雙鍵全部氫化而得到CBC高分子，在使用儀器分析來比較他們的物性、化性差異。
利用GPC的鑑定分析得知分子量(Mw)及分子量分佈(PDI)，並合成相對分子量約六萬及九萬左右的高分子。透過1H-NMR的分析判斷合成高分子中苯乙烯含量確實佔總分子量的約30%、60%、85%，並分析他們不同的加成比例如1,4加成、1,2加成。使用FTIR觀察分析氫化前後的特徵吸收峰變化，並利用TGA、DSC進行熱性質分析。之後利用萬能試驗機測試拉伸強度，用流變儀進行流變學量測。

關鍵字

陰離子聚合法 ； 苯乙烯 ； 丁二烯 ； 氫化 ； 嵌段共聚物

並列摘要

This research investigates the sec-butyllithium as a reactive initiator to synthesize the block copolymer of the styrene series under the non-polar solvent via living anionic polymerization. In this research, the hard segment of the molecule is polystyrene and the soft segment is polybutadiene. The proportion of styrene was change to 30%, 60% and 85% to synthesize the triblock SBS and pentablock SBSBS. We also completed the reaction of hydrogenation in ITRI to produce the CBC polymer. The final part of this experiment is to figure out the differences between physical properties and chemical properties by using the instrumental analysis to make the comparison.
In order to complete the comparison, the analyses below have been done to produce the final result. According to GPC identification, the relative molecular weight and the molecular weight distribution can be acquired. In the research, the polymer with 60,000 and 90,000 molecular weight is produced, containing 30%, 60% and 85% of the styrene-block proportion. According to the analysis of the 1H-NMR, we can obtain the precise styrene-block proportion and the additions of the butadiene-block such as cis-1,4-addition, trans-1,4-addition and 1,2-addition. Another apparatus we used to observe the characteristic absorption peaks which result from the polymer is FTIR. For the thermal properties, TGA and DSC were what we used to figure out. Finally, the measurement of Rheological properties was completed by DSR and DMA.

並列關鍵字

anionic polymerization ； styrene ； butadiene ； hydrogenation ； CBC ； rheology

參考文獻

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