Solid-State Polymerization of Bisphenol A Polycarbonate with a Spray-Crystallizing Method

被引：6
作者：
Kim, Jong Hun [1 ]
机构：
[1] LG Chem Ltd, Taejon 305380, South Korea
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2009年 / 111卷 / 02期
关键词：
crystal structures; crystallization; polycarbonates; solid-state polymerization; MELTING BEHAVIOR; TOPOLOGICAL CONSTRAINTS; SUPERCRITICAL CO2; ETHER KETONE); POLYMERS; CARBONATE);
D O I：
10.1002/app.29133
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A novel crystallization method for the production of high-molecular-weight bisphenol A polycarbonate by solid-state polymerization is suggested. In this method, a low-molecular-weight polycarbonate prepolymer is dissolved in a solvent and then partially crystallized with a novel spray-crystallizing method to prepare crystallized polycarbonate particles having a very uniform and porous structure with a narrow melting region. As a result, during solid-state polymerization, the phenol byproduct can be easily removed from the polymerizing porous polycarbonate particles, and the polymerization rate is dramatically increased. In particular, the effects of the crystallization methods on secondary crystallization during solid-state polymerization and the melting behavior have been investigated with differential scanning calorimetry studies. The final product, a high-molecular-weight polycarbonate, displays a very narrow molecular weight distribution and Uniform physical properties. A simultaneous process and an adequate reactor design for spray crystallization and solid-state polymerization are also suggested. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 883-889, 2009
引用
收藏
页码：883 / 889
页数：7
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