Control of Molecular Weight Distribution in Polycondensation Polymers. Polyamide Synthesis
Control of Molecular Weight Distribution in Polycondensation Polymers. Polyamide Synthesis
复制标题
缩聚聚合物中分子量分布的控制。
DOI：
10.1295/polymj.34.261
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发表时间：
2002
期刊：
影响因子：
2.8
通讯作者：
M. Ueda
中科院分区：
文献类型：
--
作者：
Y. Shibasaki;T. Araki;M. Okazaki;M. Ueda
采用缩聚法制备了分子量分布较窄（Mw/Mn）的芳香族聚酰胺。为防止常规缩聚，制备了4-（n-辛基氨基）苯甲酰苯并恶唑啉-2-硫酮(2)的金属酰胺阴离子新单体。2 -对硝基苯甲酰氯的投料比在103 ~ 104范围内可控制聚合物的平均分子量（Mn）s，保持较窄的Mw//Mns（约1.15）。聚合动力学图显示聚合时间与- (1/[I]0) ln（[M]/[M]0）呈线性关系，聚合速率为116.4 mol-1 h-1。
Synthesis of the aromatic polyamide with a narrow molecular weight distribution (Mw/Mn) was investigated via polycondensation. The new monomers, metal amide anions of 4-(N-octylamino)benzoylbenzoxazolin-2-thione (2) was prepared to prevent conventional polycondensation. The number average molecular weights (Mn)s of the resulting polymer could be controlled varying the feed ratio of 2 and p-nitrobenzoyl chloride in the range of 103–104 maintaining narrow Mw//Mns (ca. 1.15). The kinetic plots of the polymerization gave a linear relationship between polymerization time and –(1/[I]0) ln([M]/[M]0), and the rate of the polymerization was estimated as 116.4 mol-1 h-1.