Radical copolymerization behavior of a highly fluorinated cyclic olefin with vinyl ether
Radical copolymerization behavior of a highly fluorinated cyclic olefin with vinyl ether
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高氟化环烯烃与乙烯基醚的自由基共聚行为
DOI：
10.1002/pola.10198
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Endo
中科院分区：
文献类型：
--
作者：
S. Nishida;H. Nishida;T. Endo
研究了高氟环状单体八氟环戊烯（OFCPE，M1）与乙基乙烯基醚（EVE，M2）在自由基引发剂存在下的本体共聚反应。尽管每个单体的均聚性差，但共聚成功地进行，并且共聚物的分子量高达10，000以上。将OFCPE单元并入共聚物中导致玻璃化转变点的增加。共聚物组成由1H NMR谱和元素分析数据确定。共聚物中OFCPE单元的摩尔分数增加并接近但不超过0.5。通过Yamada-Itahashi-大津非线性最小二乘程序估算单体竞聚率，r1，OFCPE = −0.008 ± 0.010，r2，EVE = 0.192 ± 0.015。竞聚率清楚地表明，在过量进料OFCPE的情况下，共聚交替进行。© 2002 Wiley Periodicals，Inc.聚合物科学杂志A部分：聚合物化学40：1151-1156，2002年
The copolymerization of a highly fluorinated cyclic monomer, octafluorocyclopentene (OFCPE, M1), with ethyl vinyl ether (EVE, M2) was investigated with a radical initiator in bulk. Despite the poor homopolymerizability of each monomer, the copolymerization proceeded successfully, and the molecular weights of the copolymers reached up to more than 10,000. Incorporation of the OFCPE units into the copolymer led to an increase in the glass-transition point. The copolymer composition was determined from 1H NMR spectra and elemental analysis data. The molar fraction of the OFCPE unit in the copolymer increased and approached but did not exceed 0.5. The monomer reactivity ratios were estimated by the Yamada–Itahashi–Otsu nonlinear least-squares procedure as r1,OFCPE = −0.008 ± 0.010 and r2,EVE = 0.192 ± 0.015. The reactivity ratios clearly suggest that the copolymerization proceeds alternatively in the case of an excessive feed of OFCPE. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 1151–1156, 2002