合成對排苯乙烯接枝共聚物及其官能化反應

Preparation of Syndotactic Polystyrene Graft Copolymers and their Functionalize reaction

鄭琇毓(mei-ling cheng)

指導教授 ： 江彰吉

中原大學/理學院/化學研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100342

摘要

摘要

由於塑膠具有質量輕巧、加工容易及形狀多變之優點，成為生活上不可缺的用品。其中應用最廣泛的塑膠有聚苯乙烯，聚乙烯、聚丙烯、聚氯乙烯等。在聚烯烴類中，可經由共聚、接枝之方法改質，來改善其黏著性與相容性。在聚苯乙烯的改質反應包括五個步驟，（1）過渡金屬催化共聚合反應（2）酸化反應（3）氫硼化反應（4）縮合接枝聚合反應（5）陰離子接枝反應；所製備的sPS聚苯乙烯-接枝複合物有兩類，第一類是合成苯乙烯與4-甲基苯乙烯共聚物（sPS-co-p -MS），再由sPS-co-p-MS （簡稱sPS）接枝SBR形成sPS-g-SBR複合物；第二類是合成苯乙烯與4-甲基苯乙烯共聚物（sPS）接枝PS形成sPS-g-PS複合物，其機械強度，黏著性與相容性均有改變。本實驗在過渡金屬催化聚合反應中使用兩種不同的Metallocene觸媒,4甲基苯乙烯在共聚物中的量可達20(mole)%以上，再利用此共聚物來進行官能化，將共聚物中4-甲基苯乙烯之-CH3轉變為-COOH，如此可以與含有羥基的SBR進行縮合接枝聚合反應來完成SBR的接枝。另外我們也利用陰離子接枝反應的方法來完成對排性聚苯乙烯接枝。

關鍵字

對排苯乙烯 ； 縮合接枝反應 ； 氫硼化反應

並列摘要

This thesis discusses the method to prepare polystyrene graft copolymer , such as polystyrene-co-4-methylstyrene graft polystyrene-co- 1,4-Poly -butidiene, polystyrene-co-4-methylstyrene graft polystyrene. The synthesis polystyrene-co-4-methylstyrene by metallocene catalyst. The amount of 4-methylstyrene in copolymer can achieve 20﹪,then functionalization and grafting reaction by the methyl group in 4-methy-
styrene. The functionalization includes acdic reaction and hydroboration reaction.The oxidation of polystyrene-co-4-methylstyrene to carboxylic acids by cobalts and molecular oxygen in acetic acid solution. Polystyrene-co-1,4-Polybutidiene to hydroboration by 9-BBN. A successive route to condensation graft copolymers with polystyrene-co -4-methylstyrene backbone and polystyrene-co-1,4-polybutidiene side chains. And polystyrene-co-4-methylstyrene anionic grifting polymer -ization of styrene. Selective metallation reaction of 4-methylstyrene units in the copolymer and subsequent anion graft-fron polymerization were effective to produce polymeric side chains with well-defined structure.

並列關鍵字

Syndotactic Polystyrene ； hydroboration reaction ； condensation graft copolymers

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