Block copolymerization of ethylene oxide and acrylonitrile and the influence of block length of polyacrylonitrile on the thermal behavior and morphology of block copolymer
Block copolymerization of ethylene oxide and acrylonitrile and the influence of block length of polyacrylonitrile on the thermal behavior and morphology of block copolymer
复制标题
环氧乙烷与丙烯腈嵌段共聚及聚丙烯腈嵌段长度对嵌段共聚物热行为和形貌的影响
DOI：
10.1002/(sici)1099-0518(199605)34:7
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Wenkui Lou
中科院分区：
文献类型：
--
作者：
Junlian Huang;Xiaoyu Huang;Wenbing Hu;Wenkui Lou
以对氨基酚为母体化合物，具有阴离子和电荷转移聚合特性的双功能引发剂可用于嵌段共聚物的合成。用这种方法制备了环氧乙烷-丙烯腈嵌段共聚物（PEO-b-PAN）。第一步，带保护胺基的对氨基酚钾引发环氧乙烷（EO）聚合，生成端基为希夫斯碱的聚氧聚乙烯（PEO）。电荷转移配合物（CTC）是由希夫斯碱酸解形成的苯胺基PEO预聚物和二苯甲酮（BP）在紫外线照射下引发的丙烯腈聚合组成的。预聚物PEO和嵌段共聚物的分子量以及IR、DSC和NMR的强烈变化证实了成功的嵌段。嵌段共聚在很大程度上取决于溶剂的极性。讨论了聚丙烯腈嵌段长度对聚丙烯腈玻璃化转变温度和聚丙烯腈嵌段结晶度的影响。父子公司
A bifunctional initiator with the characteristics of anionic and charge transfer polymerization using p-aminophenol as parent compound is useful for synthesis of block copolymers. A block copolymer of ethylene oxide and acrylonitrile (PEO-b-PAN) is prepared by this method. In the first step, p-aminophenol potassium with protected amine group initiated polymerization of ethylene oxide (EO) to yield polyethylene oxide (PEO) with Schiffs base end groups. The charge transfer complexes (CTC) consisted of the PEO prepolymers with aniline group, which is formed by acidolysis of Schiffs base, and benzophenone (BP) initiated the polymerization of acrylonitrile under UV irradiation. Successful blocking has been confirmed by a strong change in the molecular weight of the prepolymer PEO and the block copolymer as well as IR, DSC, and NMR. The block copolymerization are strongly dependent on the polarity of the solvents. The effect of length of PAN block on glass transition temperature of PAN and the crystallinity of PEO block were discussed. & Sons, Inc.