Selective Chain Transfer Reactions induced by Vinylsilylborane: An Effective Method for Preparations of Isotactic Polypropylene-based Stereoregular Diblock Copolymers
碩士 === 國立中正大學 === 化學工程研究所 === 99 === In the current study, we demonstrate a novel selective chain transfer reaction that facilitates the end functionalization of isotactic propylene (iPP) by using 2-(9-borabicyclo [3.3.1] nonane) ethanyl dimethylvinyl silane (B-DMS) and hydrogen as chain transfer ag...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/66049596450693143040 |
| Summary: | 碩士 === 國立中正大學 === 化學工程研究所 === 99 === In the current study, we demonstrate a novel selective chain transfer reaction that facilitates the end functionalization of isotactic propylene (iPP) by using 2-(9-borabicyclo [3.3.1] nonane) ethanyl dimethylvinyl silane (B-DMS) and hydrogen as chain transfer agents. The resulting end-functionalized iPP can be used to undergo subsequent functional group transformation reactions for providing the hydroxyl end-capped iPP as end-functionalized prepolymer.
The hydroxyl end group of the iPP-OH can be used to undergo living ring opening polymerization of ε-caprolactone and L-lactide for providing stereoregular diblock copolymers, including iPP-block-polycaprolactone (iPP-b-PCL) and iPP-block-poly-L-lactide (iPP-b-PLLA), can be successfully prepared with high yield. Our studies clearly demonstrated that B-DMS can act as an effective chain transfer agent, which offers end functionalization of various stereoregular polymers with high yield and which offer the successful preparation of various stereoregular block copolymers that are difficult to be synthesized by other method.
|
|---|