低聚物对生物基聚对苯二甲酸丙二醇酯结晶性能的影响

doi:10.13475/j.fzxb.20200100606

纺织学报 ›› 2020, Vol. 41 ›› Issue (10): 1-6.doi: 10.13475/j.fzxb.20200100606

• 纤维材料 • 下一篇

低聚物对生物基聚对苯二甲酸丙二醇酯结晶性能的影响

陈咏¹^,², 王晶晶², 王朝生², 顾栋华³, 乌婧¹(), 王华平¹^,²

1.东华大学纺织产业关键技术协同创新中心, 上海 201620
2.东华大学材料科学与工程学院,上海 201620
3.江苏国望高科纤维有限公司, 江苏苏州 215226

收稿日期:2020-01-06 修回日期:2020-07-11 出版日期:2020-10-15 发布日期:2020-10-27
通讯作者: 乌婧
作者简介:陈咏(1992—),男,博士生。主要研究方向为环境友好高分子材料。
基金资助:
国家重点研发计划项目(2017YFB0309400)

Effect of oligomers on crystalline properties of polytrimethylene terephthalate

CHEN Yong¹^,², WANG Jingjing², WANG Chaosheng², GU Donghua³, WU Jing¹(), WANG Huaping¹^,²

1. Co-Innovation Center for Textile Industry, Donghua University, Shanghai 201620, China
2. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
3. Jiangsu Guowang Hi-Tech Fiber Co., Ltd., Suzhou, Jiangsu 215226, China

Received:2020-01-06 Revised:2020-07-11 Online:2020-10-15 Published:2020-10-27
Contact: WU Jing

摘要/Abstract

摘要：

逐步缩聚聚合物中通常含有一定比例的线性及环状低聚物,会影响纤维材料的成形加工、纤维性能、纺织品加工等。为探究低聚物对生物基对苯二甲酸丙二醇酯(PTT)结晶性能的影响,通过外部添加法制备得到具有不同低聚物质量分数(主要以环状二聚体为主)的生物基 PTT ,采用差示扫描量热仪分析方法对生物基PTT的结晶动力学进行研究。结果表明:低聚物的存在主要起成核剂的作用,其质量分数的增加可提高生物基 PTT的结晶速率、结晶温度及结晶度;添加低聚物质量分数为10%时,生物基 PTT的结晶速率常数由未添加的0.528提升至0.603,同时结晶温度由172.11 ℃提升至178.85 ℃。

关键词: 低聚物, 环状低聚物, 生物基聚酯, 聚对苯二甲酸丙二醇酯, 结晶动力学

Abstract:

Step-polymerization of polymers usually contains a certain proportion of linear and circular oligomers, which will affect the forming process of fiber materials, fiber properties, textile processing and so on. To investigate the influence of oligomers on the crystallization properties of bio-based polytrimethylene terephthalate (PTT), bio-based PTT samples with varied oligomer contents (mainly comprising cyclic dimers) were prepared by adding the extracted oligomers into relatively pure PTT samples. Differential scanning calorimetry analysis was used to study the crystallization kinetics of bio-based PTT polyesters. The results show that the existence of oligomer mainly acts as nucleating agent, and the increase of its mass fraction can significantly increase the crystallization rate, the crystallization temperature and crystallinity of bio-based PTT. When the mass fraction of oligomer is 10%, the crystallization rate constant of PTT increased from 0.528 to 0.603, while the crystallization temperature increased from 172.11 ℃ to 178.85 ℃.

Key words: oligomer, cyclic oligomer, bio-based polyester, polytrimethylene terephthalate, crystallization kinetic

中图分类号:

TQ342

陈咏, 王晶晶, 王朝生, 顾栋华, 乌婧, 王华平. 低聚物对生物基聚对苯二甲酸丙二醇酯结晶性能的影响[J]. 纺织学报, 2020, 41(10): 1-6.

CHEN Yong, WANG Jingjing, WANG Chaosheng, GU Donghua, WU Jing, WANG Huaping. Effect of oligomers on crystalline properties of polytrimethylene terephthalate[J]. Journal of Textile Research, 2020, 41(10): 1-6.

图/表 6

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降温速率/ (℃·min^-1)	0%			4%			8%			10%
降温速率/ (℃·min^-1)	T_P	△W	t_1/2	T_P	△W	t_1/2	T_P	△W	t_1/2	T_P	△W	t_1/2
5	172.11	9.80	1.26	173.35	9.72	1.24	173.83	8.15	0.91	178.85	5.58	0.90
10	162.69	13.53	1.60	163.73	13.38	1.55	164.81	7.35	1.21	168.8	6.47	1.20
15	157.02	16.91	2.31	158.55	16.89	2.28	159.46	8.43	1.90	164.49	6.08	1.77
20	151.99	20.46	3.90	153.31	20.16	3.53	157.07	9.55	3.52	161.86	6.41	2.95

降温速率/ (℃·min^-1)	0%			4%			8%			10%
降温速率/ (℃·min^-1)	n	Z_t	Z_c	n	Z_t	Z_c	n	Z_t	Z_c	n	Z_t	Z_c
5	1.050	0.041	0.528	1.046	0.063	0.589	1.035	0.071	0.575	1.033	0.079	0.603
10	1.024	0.112	0.803	1.016	0.134	0.817	1.025	0.164	0.834	1.022	0.177	0.841
15	1.037	0.191	0.895	1.018	0.198	0.898	1.025	0.271	0.916	1.024	0.279	0.918
20	1.034	0.264	0.935	1.024	0.272	0.937	1.021	0.380	0.952	1.029	0.300	0.953

低聚物对生物基聚对苯二甲酸丙二醇酯结晶性能的影响

Effect of oligomers on crystalline properties of polytrimethylene terephthalate

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