有機金屬可逆性加成裂解鏈轉移劑的合成與聚合應用

Synthesis and Charaterization of Thiocarbonylthio Complex Containing Polystyrene via Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization.

梁耀仁(Yao-Ren Liang)

指導教授 ： 羅義興 ； 李文福

大同大學/工程學院/化學工程學系所/碩士(2009年)

摘要

具有特殊功能的高分子材料為相關產業所急需，而高分子材料性能的掌握與控制高分子結構，我們設計合成了以有機金屬為主體的有機金屬可逆性加成裂解鏈轉移劑 (a) [TpRuS2C-R, R = PPh3, OMe, OEt, Ph], (b) [TpRuS2P(OEt)2] { Tp = hydridotripyrazolylborate, BH[(C3H3N2)3]}，為新穎有機金屬可逆性加成裂解鏈轉移劑，進行活性自由基聚合反應，包括在至少一種之起始劑(initiator)及至少一種之有(TpRuS2C-R)存在的狀況下，將一種或一種以上之單體進行聚合反應，可得到具有較低聚合度分佈性指數及具有高分子鏈末端金屬官能基化之聚合物。另一方面，所得之聚合物可更進一步進行金屬脫去反應，以得到同樣具有較低聚合度分佈性指數之有機聚合物。所得到的聚合物其PDI介於1.1~1.7之間。

關鍵字

有機金屬 ； 可逆性加成裂解鏈轉移

並列摘要

Synthetic polymers have Living/controlled radical polymerization with reversible addition-fragmentation chain transfer (RAFT polymerization) can be achieved with the use of novel organometallic ruthenium complex (a) [TpRuS2C-R, R = PPh3, OMe, OEt, Ph], (b) [TpRuS2P(OEt)2] {where Tp is hydridotripyrazolylborate, BH[(C3H3N2)3]}. Electron with drawing organometallic substituents can enhance the activity of RAFT reagents. In addition, the terminal organometallic functional group may be removed by subjecting the obtained polymer to elimination to provide the corresponding organic polymer. In this study, organometallic reagents bearing dithiocarbonyl group is synthesized and applied to RAFT polymerization of styrene with conventional initiator, azobisisobutyronitril (AIBN) at 60℃. Monomer conversion, molecular weight evolution, and polydispersity index (PDI) are measured. The PDI of the formed polymer is between 1.1 and 1.7 in the presence of RAFT reagents.

並列關鍵字

RAFT ； Polymerization

參考文獻

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