THE REACTIVITY RATIOS AND SEQUENCE-LENGTH DISTRIBUTION OF PHOTO-INDUCED COPOLYMERIZATION OF MA AND AATP IN SOLUTION

LIU Xiaoxuan; DENG Xianghua; ZHANG Ting; WU Guangguo

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THE REACTIVITY RATIOS AND SEQUENCE-LENGTH DISTRIBUTION OF PHOTO-INDUCED COPOLYMERIZATION OF MA AND AATP IN SOLUTION

Research Article | 更新时间：2021-03-19

- THE REACTIVITY RATIOS AND SEQUENCE-LENGTH DISTRIBUTION OF PHOTO-INDUCED COPOLYMERIZATION OF MA AND AATP IN SOLUTION
- Acta Polymerica Sinica Issue 1, Pages: 118-123(2006)
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- Published：20 February 2006，
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LIU Xiaoxuan, DENG Xianghua, ZHANG Ting, WU Guangguo. THE REACTIVITY RATIOS AND SEQUENCE-LENGTH DISTRIBUTION OF PHOTO-INDUCED COPOLYMERIZATION OF MA AND AATP IN SOLUTION. [J]. Acta Polymerica Sinica (1):118-123(2006)
DOI：

LIU Xiaoxuan, DENG Xianghua, ZHANG Ting, WU Guangguo. THE REACTIVITY RATIOS AND SEQUENCE-LENGTH DISTRIBUTION OF PHOTO-INDUCED COPOLYMERIZATION OF MA AND AATP IN SOLUTION. [J]. Acta Polymerica Sinica (1):118-123(2006) DOI：

摘要

以丙烯酸甲酯(MA

M1)和4-丙烯酰胺基-2

6-四甲基哌啶(AATP

M2)溶液光共聚合体系为研究对象

采用1H-NMR手段测定了MA／AATP共聚物的组成

用Mayo—Lewis积分法和扩展Kelen-Tudos方法计算的竞聚率分别为0.88r1r2r1=0.90和r2=0.50研究结果表明

在MA／AAlrP光共聚体系中

两种单体的竞聚率均小于1.0

且在f1=0.73处有一恒分共聚点

属于非理想共聚体系由所得竞聚率计算了MA／AATP共聚物主链结构的序列长度分布f2=0.7时

MA序列长度为1的含量占80.0％

MA单元基本上被AATP单元分隔开；f2=0.5时

两种单元体在共聚物主链上交替出现；f2=0.1时

AATP单元序列长度为1的含量占95.0％

AATP主要以单个单元分布在MA链中.

Abstract

The photo-induced eopotymerization of methyl acrylate(MA

M1)and 4-acrylamido-2

6- tetramethyl—piperidine(AATP

M2)in pyridine solutions was studied．The composition of MA and AATP copolymers was determined with1H-NMR method．According to the composition of poly(MA—CO—AATP)

the reactivity ratios of MA／AATP copolymerization system were calculated as 0．88121=0．90 and r2=0．50 by the extended Kelen-Tudos method．The results showed that the reactivity ratios of both MA and AATP monomer were less than 1

as r12f1=0．73．On the basis of the reactivity ratios of two monomers

the sequence-length distribution in the MA／AATP copolymers was obtained．Forf2=O．7

the probability of the MA sequence of 1 unit in the copolymer chain is 80．0％

the monomer unit of MA is mostly separated by the sequence of AATP；and for f2=0.5

the alternating tendency prevails and a large number of mono—sequences are formed；and in the case of f2=0．1

the probability of the AATP sequence of 1 unit in the eopolymer chain is 95．0％

the monomer unit of AATP is individually separated in tlle chain of MA．

关键词

AATP光共聚合竞聚率序列分

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