SYNTHESIS OF HETEROARM STAR-SHAPED POLYMER BY THE USE OF POLYFUNCTIONAL CHAIN-TRANSFER AGENT via CONVENTIONAL FREE RADICAL POLYMERIZATION

Zhi-hua Luo; Zhi-feng Fu; Yan Shi

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SYNTHESIS OF HETEROARM STAR-SHAPED POLYMER BY THE USE OF POLYFUNCTIONAL CHAIN-TRANSFER AGENT via CONVENTIONAL FREE RADICAL POLYMERIZATION

Papers | Updated：2021-06-21

- SYNTHESIS OF HETEROARM STAR-SHAPED POLYMER BY THE USE OF POLYFUNCTIONAL CHAIN-TRANSFER AGENT via CONVENTIONAL FREE RADICAL POLYMERIZATION
- Vol. 26, Issue 3, Pages: 321-329(2008)
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- Published：20 May 2008
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Zhi-hua Luo, Zhi-feng Fu, Yan Shi. SYNTHESIS OF HETEROARM STAR-SHAPED POLYMER BY THE USE OF POLYFUNCTIONAL CHAIN-TRANSFER AGENT via CONVENTIONAL FREE RADICAL POLYMERIZATION[J]. 2008, 26(3): 321-329.
DOI：

Zhi-hua Luo, Zhi-feng Fu, Yan Shi. SYNTHESIS OF HETEROARM STAR-SHAPED POLYMER BY THE USE OF POLYFUNCTIONAL CHAIN-TRANSFER AGENT via CONVENTIONAL FREE RADICAL POLYMERIZATION[J]. 2008, 26(3): 321-329. DOI：

摘要

Heteroarm star-shaped polymers were synthesized by conventional free radical polymerization in two steps by the use of polyfunctional chain transfer agent. In the first step

free radical polymerization of methyl methacrylate was carried out in the presence of a polyfunctional chain transfer agent

pentaerythritol tetrakis(3-mercaptopropinate). At appropriate monomer conversions

two-arm PMMA having two residual thiol groups at the chain center or three-arm PMMA having one residual thiol group at the core were obtained. In the second step

free radical polymerization of styrene was carried out using PMMAs obtained above as macro-chain transfer agent. When styrene conversion was lower than 30%

heteroarm star-shaped polymers

(PMMA)2(PS)2 and (PMMA)3(PS)

were obtained successfully.

Abstract

Heteroarm star-shaped polymers were synthesized by conventional free radical polymerization in two steps by the use of polyfunctional chain transfer agent. In the first step

free radical polymerization of methyl methacrylate was carried out in the presence of a polyfunctional chain transfer agent

pentaerythritol tetrakis(3-mercaptopropinate). At appropriate monomer conversions

two-arm PMMA having two residual thiol groups at the chain center or three-arm PMMA having one residual thiol group at the core were obtained. In the second step

free radical polymerization of styrene was carried out using PMMAs obtained above as macro-chain transfer agent. When styrene conversion was lower than 30%

heteroarm star-shaped polymers

(PMMA)2(PS)2 and (PMMA)3(PS)

were obtained successfully.

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