生物基聚对苯二甲酸丙二醇酯低聚物的提取及其热性能

doi:10.13475/j.fzxb.20190705607

纺织学报 ›› 2020, Vol. 41 ›› Issue (06): 1-7.doi: 10.13475/j.fzxb.20190705607

• 纤维材料 • 下一篇

生物基聚对苯二甲酸丙二醇酯低聚物的提取及其热性能

王晶晶¹, 陈咏¹, 王朝生¹, 王华平¹^,², 边树昌³, 乌婧²()

1.东华大学材料科学与工程学院, 上海 201620
2.东华大学纺织产业关键技术协同创新中心,上海 201620
3.江苏国望高科纤维有限公司, 江苏苏州 215000

收稿日期:2019-07-19 修回日期:2020-03-11 出版日期:2020-06-15 发布日期:2020-06-28
通讯作者: 乌婧
作者简介:王晶晶(1994—),女,硕士生。主要研究方向为高分子材料合成。
基金资助:
国家重点研发计划项目(2017YFB0309400)

Extraction of oligomers from bio-based propylene terephthalate polyester and its thermal properties

WANG Jingjing¹, CHEN Yong¹, WANG Chaosheng¹, WANG Huaping¹^,², BIAN Shuchang³, WU Jing²()

1. School of Materials Science and Engineering, Donghua University, Shanghai 201620, China
2. Key Technology Collaborative Innovation Center of Textile Industry, Donghua University, Shanghai 201620, China
3. Jiangsu Guowang High-Tech Fiber Co., Ltd., Suzhou, Jiangsu 215000, China

Received:2019-07-19 Revised:2020-03-11 Online:2020-06-15 Published:2020-06-28
Contact: WU Jing

摘要/Abstract

摘要：

针对目前生物基聚对苯二甲酸丙二醇酯(PTT)产业化过程中,大量环状低聚物的形成易对后续加工造成不良影响的问题,通过索氏提取法和溶解沉淀法对生物基PTT切片、纤维及粉末样品中提取的环状低聚物进行表征与分析。结果表明:从PTT纤维中提取的环状低聚物的质量分数为3.6%,比PTT切片中的高约1%;低聚物的主要组分为环状二聚体,其质量分数约占低聚物总量的85%~90%;同时检测出低质量分数的环状三聚体、环状四聚体、环状五聚体及环状七聚体,几种组分占低聚物总量的10%~15%;环状低聚物的热稳定性远低于生物基PTT高聚物且具有比高聚物更高的熔融温度,可充当成核剂,促进高聚物的结晶。

关键词: 聚合物, 生物基聚对苯二甲酸丙二醇酯, 环状低聚物, 溶剂萃取, 热性能

Abstract:

Aiming at the problem that the formation of a large number of cyclic oligomers in the industrialization process of current bio-based propylene terephthalate (bio-based PTT) is likely to adversely affect subsequent processing, the Soxhlet extraction method and the dissolution-precipitation method were used to characterize and analyze cyclic oligomers extracted from PTT slices, fibers and powder samples. It is reported from this research that the content of cyclic oligomers extracted from the fiber sample was 3.6%, which is about 1% higher than the slice. The main component of the oligomer is cyclic dimer, and its mass fraction is 85%-90% of the total of oligomers. Low levels of cyclic trimer, cyclic tetramer, cyclic pentamer, and cyclic heptamer are detected at the same time, and the total content of these components is about 10%-15%. The thermal stability of cyclic oligomers is found much lower than that of bio-based PTT polymers and higher than polymers in melting point, showing function of nucleating agent and could promote the crystallization of polymers.

Key words: polymer, bio-based propylene terephthalate, cyclic oligomer, solvent extraction, thermal property

中图分类号:

TQ342.29

王晶晶, 陈咏, 王朝生, 王华平, 边树昌, 乌婧. 生物基聚对苯二甲酸丙二醇酯低聚物的提取及其热性能[J]. 纺织学报, 2020, 41(06): 1-7.

WANG Jingjing, CHEN Yong, WANG Chaosheng, WANG Huaping, BIAN Shuchang, WU Jing. Extraction of oligomers from bio-based propylene terephthalate polyester and its thermal properties[J]. Journal of Textile Research, 2020, 41(06): 1-7.

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样品编号	数均分子量	重均分子量	分子量分散度	特性黏度/ (dL·g^-1)
PTT-1	17 400	42 300	2.4	1.01
PTT-2	19 500	47 700	2.4	0.99
PTT-3	19 500	43 600	2.2	0.97

样品编号	切片低聚物提取量	纤维低聚物提取量
PTT-1	2.60	3.23
PTT-2	2.39	2.79
PTT-3	3.01	3.55

生物基聚对苯二甲酸丙二醇酯低聚物的提取及其热性能

Extraction of oligomers from bio-based propylene terephthalate polyester and its thermal properties

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