压力对聚对苯二甲酸乙二醇酯-聚酰胺6共聚物/聚酰胺6共混物流变性能的影响

doi:10.13475/j.fzxb.20181205305

纺织学报 ›› 2019, Vol. 40 ›› Issue (12): 27-31.doi: 10.13475/j.fzxb.20181205305

压力对聚对苯二甲酸乙二醇酯-聚酰胺6共聚物/聚酰胺6共混物流变性能的影响

郭增革¹, 姜兆辉¹(), 贾曌¹, 蒲丛丛¹, 李鑫², 程博闻³

1.山东理工大学鲁泰纺织服装学院, 山东淄博 255000
2.中国纺织科学研究院有限公司生物源纤维制造技术国家重点实验室, 北京 100025
3.天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室, 天津 300387

收稿日期:2018-12-25 修回日期:2019-08-15 出版日期:2019-12-15 发布日期:2019-12-18
通讯作者: 姜兆辉
作者简介:郭增革(1986—),男,讲师,博士。主要研究方向为功能纤维的结构与性能。
基金资助:
国家重点研发计划项目(2016YFB0302800);山东省高等学校科技计划项目(J17KB011);淄博市校城融合发展计划项目(2018ZBXC474);生态纺织教育部重点实验室(江南大学)课题(KLET1603)

Influence of pressure on rheological behavior of polyethylene terephthalate-polyamide 6 copolymer/polyamide 6 blends

GUO Zengge¹, JIANG Zhaohui¹(), JIA Zhao¹, PU Congcong¹, LI Xin², CHENG Bowen³

1. Lutai School of Textile and Apparel, Shandong University of Technology, Zibo, Shandong 255000
2. State Key Laboratory of Biobased Fiber Manufacturing Technology, China Textile Academy, Beijing 100025, China
3. State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China

Received:2018-12-25 Revised:2019-08-15 Online:2019-12-15 Published:2019-12-18
Contact: JIANG Zhaohui

摘要/Abstract

摘要：

为研究高压条件下聚合物的流变性能,以熔融共混挤出的方法制备聚对苯二甲酸乙二醇酯-聚酰胺6嵌段共聚物(PET-PA6)与聚酰胺6(PA6)共混物,利用安装在反向压力腔末端的旋塞控制毛细管出口压力,研究该共混物在出口压力为5~50 MPa条件下,剪切速率和温度对PET-PA6/PA6共混物流变行为的影响。结果表明:PET-PA6/PA6共混物的剪切黏度随压力的变化规律符合Barus方程;在恒定剪切速率下,随着毛细管内平均压力的增加,剪切黏度逐渐增大;当剪切速率从108 s^-1增加到1 080 s^-1时,压力系数减小19.24%,当温度从265 ℃增加到 290 ℃ 时,压力系数减小32.33%,共混物熔体剪切黏度对压力的依赖性随剪切速率和温度的增加逐渐减小。

关键词: 聚对苯二甲酸乙二醇酯-聚酰胺6共聚物, 聚酰胺6, 剪切黏度, 流变行为, 压力系数

Abstract:

In order to study the rheological properties of polymers under high pressure, blends of polyethylene terephthalate-polyamide 6 copolymer (PET-PA6) and polyamide 6(PA6) were prepared by melt blending and co-extruding. The influence of pressure, shear rate and temperature on the rheological behavior of PET-PA6/PA6 blends were studied under the conditions of the outlet pressure of the capillary tube of 5-50 MPa controlled by a cock mounted at the end of the reverse pressure chamber. The results indicate that the shear viscosity of PET-PA6/PA6 blends conforms to the Barus equation with the change of pressure. At a constant shear rate, the shear viscosity of PET-PA6/PA6 blends increases gradually with the capillary pressure. When the shear rate is increased from 108 s^-1 to 1 080 s^-1, the pressure coefficient decreases by 19.24%, and when the temperature is increased from 265 to 290 ℃, the pressure coefficient decreases by 32.33%. The dependence of shear viscosity of PET-PA6/PA6 blends on pressure decreases with the shear rate and the temperature.

Key words: polyethylene terephthalate-polyamide 6 copolymer, polyamide 6, shear viscosity, rheological behavior, pressure coefficient

中图分类号:

TQ311

郭增革, 姜兆辉, 贾曌, 蒲丛丛, 李鑫, 程博闻. 压力对聚对苯二甲酸乙二醇酯-聚酰胺6共聚物/聚酰胺6共混物流变性能的影响[J]. 纺织学报, 2019, 40(12): 27-31.

GUO Zengge, JIANG Zhaohui, JIA Zhao, PU Congcong, LI Xin, CHENG Bowen. Influence of pressure on rheological behavior of polyethylene terephthalate-polyamide 6 copolymer/polyamide 6 blends[J]. Journal of Textile Research, 2019, 40(12): 27-31.

图/表 5

图1

图2

表1

不同温度和剪切速率条件下共混物剪切黏度改变量"

$γ · a$ / s^-1	Δη/(Pa·s)
$γ · a$ / s^-1	265 ℃	270 ℃	275 ℃	280 ℃	285 ℃	290 ℃
108	194.67	187.67	115.85	99.87	93.87	91.87
216	168.98	182.97	109.13	94.95	86.90	85.92
432	164.85	156.94	99.81	86.21	84.34	83.34
648	140.19	130.19	90.06	80.30	77.30	76.30
864	114.49	111.49	79.91	74.09	73.09	69.09
1 080	94.81	88.81	69.14	66.14	63.79	63.14

表1

图3

表2

不同剪切速率和温度下压力系数平均值"

$γ · a$	108 s^-1	216 s^-1	432 s^-1	648 s^-1	864 s^-1	1 080 s^-1
β	15.95	15.30	14.36	13.52	13.00	12.88
T	265 ℃	270 ℃	275 ℃	280 ℃	285 ℃	290 ℃
β	16.92	16.05	14.83	13.42	12.34	11.45

表2

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压力对聚对苯二甲酸乙二醇酯-聚酰胺6共聚物/聚酰胺6共混物流变性能的影响

Influence of pressure on rheological behavior of polyethylene terephthalate-polyamide 6 copolymer/polyamide 6 blends

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