SYNTHESIS AND CHARACTERIZATION OF GRAFT COPOLYMER OF EAA WITH POLY(2-ETHYL-2-OXAZOLINE)

CHEN Ruizhu; ZHANG Ying; ZHANG Yuncan; PAN Enli; OU Yuchun; YU Zhongzhen

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SYNTHESIS AND CHARACTERIZATION OF GRAFT COPOLYMER OF EAA WITH POLY(2-ETHYL-2-OXAZOLINE)

Research Article | 更新时间：2021-03-19

- SYNTHESIS AND CHARACTERIZATION OF GRAFT COPOLYMER OF EAA WITH POLY(2-ETHYL-2-OXAZOLINE)
- Acta Polymerica Sinica Issue 2, Pages: 200-204(2000)
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- Published：20 April 2000，
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CHEN Ruizhu, ZHANG Ying, ZHANG Yuncan, PAN Enli, OU Yuchun, YU Zhongzhen. SYNTHESIS AND CHARACTERIZATION OF GRAFT COPOLYMER OF EAA WITH POLY(2-ETHYL-2-OXAZOLINE). [J]. Acta Polymerica Sinica (2):200-204(2000)
DOI：

CHEN Ruizhu, ZHANG Ying, ZHANG Yuncan, PAN Enli, OU Yuchun, YU Zhongzhen. SYNTHESIS AND CHARACTERIZATION OF GRAFT COPOLYMER OF EAA WITH POLY(2-ETHYL-2-OXAZOLINE). [J]. Acta Polymerica Sinica (2):200-204(2000) DOI：

摘要

选用聚乙烯丙烯酸 (EAA)为接枝母体

首先摸索出2-乙基 2-唑啉阳离子开环聚合的规律

得到高转化率端基为活性鎓离子的聚 (2-乙基2-唑啉 ) (PEOX)

再与EAA羟基侧基进行接枝反应

考察了开环聚合条件及接枝反应条件对接枝率的影响

在一定的条件下得到了接枝率 >2 5%的聚乙烯丙烯酸与聚 ( 2-乙基2-唑啉 )的接枝共聚物 (EAA-g-PEOX) .该接枝物用于聚对苯二甲酸丁二醇酯 /聚丙烯 (PBT/PP)共混体系中作相容剂

可提高两者的相容性 .

Abstract

The title graft copolymer was synthesized by a two-step polymerization process. In the first step the monomer of 2-ethyl-2-oxazoline (EOX) was polymerized by cationic ring-opening polymerization with MeOTs as initiator in toluene. The prepolymer of poly(N-propionyl-ethylenimine) (PEOX) having living propagating end of oxazolinium ion in toluene was obtained with average molecular weight less than 10

000g/mol .Then the EAA (ethylene-acrylic acid copolymer) was grafted through the reaction of pendant carboxy group of EAA with the terminated living oxazolinium ion of PEOX in toluene.The effect of various parameters such as reaction condition of cationic polymerization

grafting reaction time and temperature

reactive group in EAA and PEOX molar ratio

and carboxy group content in EAA on grafting degree and average degree of polymerization in the graft chain were evaluated.It was found that there was a maximum grafting degree of graft copolymers

when the EAA/PEOX molar ratio is in the range of 5～6.The graft copolymer EAA-g-PEOX with grafting degree>25% can be obtained under some specific conditions

such copolymer can be used as compatiblizer in PBT/PP blends to improve the compatibility of the two phases and the mechanical properties.

关键词

聚(2-乙基-2-噁唑啉)阳离子开环聚合接枝共聚合聚(乙烯丙烯酸)

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