含氟烯类的调节聚合——Ⅰ.四氟乙烯与低级脂族醇的调节聚合

引用本文: 林文德, 陈镜泓, 洪熙君, 周新月, 徐天霏, 黄维垣. 含氟烯类的调节聚合——Ⅰ.四氟乙烯与低级脂族醇的调节聚合[J]. 高分子学报, 1964, 6(5): 363-369. shu

Citation: LIN WEN-THE, CHEN GING-XUNG, HUNG SHI-JUNG, CHOW XIN-YUE, HSU TIAN-FEE, HUANG WEI-YUAN. TELOMERIZATION OF FLUORO-OLEFINS 1. TELOMERIZATION OF TETRAFLUOROETHYLENE WITH LOWER ALIPHATIC ALCOHOLS[J]. Acta Polymerica Sinica, 1964, 6(5): 363-369. shu

含氟烯类的调节聚合——Ⅰ.四氟乙烯与低级脂族醇的调节聚合

摘要: 本工作提出了一种新的引发系统即在MgO或BaO存在下的过氧化叔丁基,应用于四氟乙烯与甲醇、乙醇及异丙醇等低级脂族醇的调节聚合。对比实验证明氧化钡具有提高反应速度和调聚物总收率及降低分子量的作用。此作用对以甲醇为调节剂的反应影响最大,乙醇次之,异丙醇则较小。研究了四氟乙烯与醇类化合物的克分子比对产物分子量分布的影响。结果表明改变反应物克分子比可以较满意地控制1∶1加成物的生成。以甲醇而言,当反应物克分子比在0.10—0.28范围内,1∶1加成物产率从25.8％增至57％。从三种醇的调聚产物百分比的比较,得出链转移常数的次序是:甲醇<乙醇<异丙醇。

English

TELOMERIZATION OF FLUORO-OLEFINS 1. TELOMERIZATION OF TETRAFLUOROETHYLENE WITH LOWER ALIPHATIC ALCOHOLS

Available Online: 20 October 1964

Abstract: A new initiator system，di-tert-butyl peroxide in the presence of MgO or BaO，has been proposed for the telomerization of tetrafluoroethylene with lower aliphatic alcohols．Comparative studies showed that the presence of BaO enhanced the rate Of telomeriza-tion and increased the total yield of telomers，as well as lowered the average molecular weight of telomers．This effect i decreased in the following order：methanol>ethanol>iso-propyl alcohol．The telomerization was studied over a wide range of C2F4 alcohol molar ratios．The yield of 1：1 adduct could be satisfactorily controlled by means of the molar ratio． In the case of methanol，the percentage yield of 1：1 adduct was increased from 25．8 to 57％ by increasing the molar ratio from 0.10 to 0.28．The chain transfer constant was found to follow qualitatively the sequence：methanol