Formation of cyclic oligomer during the polycondensation of bis(2-hydroxyethyl) terephthalate

被引：0

作者：

Cho, JS

Youk, JH

Yoo, DI ^{[1
]}

Ko, SW

Ha, WS

机构：

[1] Seoul Natl Univ, Coll Engn, Dept Fiber & Polymer Sci, Seoul 151742, South Korea

[2] Chonnam Natl Univ, Coll Engn, Dept Text Engn, Kwangju 500757, South Korea

来源：

POLYMER-KOREA | 1998年 / 22卷 / 02期

关键词：

poly(ethylene terephthalate); polycondensation; cyclic oligomer; cyclization mechanism;

D O I：

暂无

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Cyclic oligomer generated during the polycondensation of bis(2-hydroxyethyl) terephthalate(BHET) leading to poly(ethylene terephthalate) (PET) was investigated by using high performance liquid chromatography (HPLC). The distribution of cyclic oligomer components was not changed with the polycondensation time except cyclic dimer. It was found from the relation of the content of individual cyclic oligomer and the reciprocal degree of polymerization(DP) that cyclic oligomer was generated at DP of about 13 similar to 14 and increased to an equilibrium at DP of ca 40. From the relationship between DP and the content of cyclic oligomer, it is found that the thermodynamic equilibrium could be reached after a long time.

引用

页码：251 / 257

页数：7