聚丙烯/丙烯⁃乙烯共聚物共混体系的流变行为研究

doi:10.19491/j.issn.1001-9278.2020.05.003

中国塑料 ›› 2020, Vol. 34 ›› Issue (5): 16-20.DOI: 10.19491/j.issn.1001-9278.2020.05.003

聚丙烯/丙烯⁃乙烯共聚物共混体系的流变行为研究

郭程¹^,², 马宗立³, 张凤波¹(), 石行波¹, 王艳芳¹, 陈商涛¹, 孟晓宇², 闫功臣³

^1.中国石油石油化工研究院，北京 102206
^2.中国石油大学（北京）新能源与材料学院，北京 102249
^3.中国石油华南化工销售公司，广州 510655

收稿日期:2020-01-02 出版日期:2020-05-26 发布日期:2020-05-26

Study on Rheological Behaviors of Polypropylene/Propylene⁃ethylene Copolymer Blends

Cheng GUO¹^,², Zongli MA³, Fengbo ZHANG¹(), Xingbo SHI¹, Yanfang WANG¹, Shangtao CHEN¹, Xiaoyu MENG², Gongchen YAN³

^1.Petrochemical Research Institute Petro China, Beijing 102206, China
^2.Department of Materials Science and Engineering, China University of Petroleum?Beijing, Beijing 102249, China
^3.South Chemical Sales Company of Petro China, Guangzhou 510655, China

Received:2020-01-02 Online:2020-05-26 Published:2020-05-26
Contact: Fengbo ZHANG E-mail:zhangfengbo010@petrochina.com.cn

摘要/Abstract

摘要：

采用毛细管流变仪和旋转流变仪研究了聚丙烯（PP）纤维专用料/丙烯?乙烯共聚物（PEC）共混体系的流变行为，探究了剪切速率、温度、共混物组成对熔体流变行为的影响。结果表明，随着剪切速率的增加，PP、PP/PEC和PEC均表现出“剪切变稀”行为；随着温度的升高，聚合物的表观黏度逐渐降低，特别是在低剪切速率下的这种现象更明显；随着PEC含量的增加，体系的非牛顿指数增加，黏流活化能降低，黏度对温度的敏感性降低，熔体剪切模量增加，熔体弹性增加。

关键词: 聚丙烯纤维专用料, 丙烯?乙烯共聚物, 共混, 流变行为

Abstract:

The rheological behaviors of fiber?grade polypropylene (PP)/propylene?ethylene copolymer (PEC) blends were studied by a capillary rheometer and rotational rheometer, and the effects of shear rate, temperature and blend composition on the rheological behaviors were analyzed. The results indicated that PP, PEC and their blends exhibited a shear?thinning behavior with an increase of shear rate. However, with the increase of temperature, the apparent viscosity of the blends gradually decreased especially at low shear rates. On the other hand, the non?Newton index of the blends tended to increase with an increase of PEC content, but their viscous flow activation energy decreased. This indicated that the sensitivity of viscosity to temperature decreased, and the melt shear modulus and melt elasticity increased.

Key words: fiber?grade polypropylene, propylene?ethylene copolymer, blend, rheological behavior

中图分类号:

TQ325.1⁺4

郭程, 马宗立, 张凤波, 石行波, 王艳芳, 陈商涛, 孟晓宇, 闫功臣. 聚丙烯/丙烯⁃乙烯共聚物共混体系的流变行为研究[J]. 中国塑料, 2020, 34(5): 16-20.

Cheng GUO, Zongli MA, Fengbo ZHANG, Xingbo SHI, Yanfang WANG, Shangtao CHEN, Xiaoyu MENG, Gongchen YAN. Study on Rheological Behaviors of Polypropylene/Propylene⁃ethylene Copolymer Blends[J]. China Plastics, 2020, 34(5): 16-20.

图/表 8

样品编号	PP含量/g	PEC含量/g	抗氧化剂1010 含量/×10^-4g	抗氧化剂168 含量/×10^-4g
PP	500	0	5	10
PP/10 % PEC	450	50	5	10
PP/20 % PEC	400	100	5	10
PP/30 % PEC	350	150	5	10
PEC	0	500	5	10

表1 样品配方表

Tab.1 Formula of samples

图1 PP/PEC共混物的lgγ˙?lgη曲线

Fig.1 lgγ˙?lgη curves of PP/PEC blends

图2 不同温度下的lgγ˙?lgη曲线

Fig.2 lgγ˙?lgη curves at different temperatures

图3 PP/PEC共混物的lgτ?lgγ˙曲线

Fig.3 lgτ?lgγ˙ curves of PP/PEC blends

温度/℃	n值
温度/℃	PP	PP/10 %PEC	PP/20 %PEC	PP/30 %PEC	PEC
190	0.452	0.459	0.465	0.471	0.511
210	0.504	0.514	0.524	0.536	0.577
230	0.562	0.565	0.574	0.578	0.624

表2 PP/PEC共混体系的n值

Tab.2 Newtonian index of PP/PEC blends

图4 PP/PEC共混物的lnη?（1/T）×103曲线

Fig.4 lnη?（1/T）×103 curves of PP/PEC blends

$r ˙$ /s^-1	ΔE /kJ·molˉ¹
$r ˙$ /s^-1	PP	PP/10 % PEC	PP/20 % PEC	PP/30 % PEC	PEC
150	24.14	22.83	22.53	23.64	20.11
400	16.49	15.83	16.20	16.23	13.49
1 500	10.53	9.62	9.57	9.84	4.92

$r ˙$ /s^-1	ΔE /kJ·molˉ¹
$r ˙$ /s^-1	PP	PP/10 % PEC	PP/20 % PEC	PP/30 % PEC	PEC
150	24.14	22.83	22.53	23.64	20.11
400	16.49	15.83	16.20	16.23	13.49
1 500	10.53	9.62	9.57	9.84	4.92

表3 PP/PEC共混物的ΔE值

Tab.3 Flow activation energy of PP/PEC blends

表3 PP/PEC共混物的ΔE值

Tab.3 Flow activation energy of PP/PEC blends

图5 PP/PEC共混体系的G′、G"和tanδ与ω的关系曲线

Fig. 5 The ω ? G′，G" and tanδ curves of PP/PEC blends

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聚丙烯/丙烯⁃乙烯共聚物共混体系的流变行为研究

Study on Rheological Behaviors of Polypropylene/Propylene⁃ethylene Copolymer Blends

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