超声辅助双螺杆机制备高密度聚乙烯/超高分子量聚乙烯复合材料及性能研究

doi:10.19491/j.issn.1001-9278.2020.08.002

中国塑料 ›› 2020, Vol. 34 ›› Issue (8): 9-16.DOI: 10.19491/j.issn.1001-9278.2020.08.002

超声辅助双螺杆机制备高密度聚乙烯/超高分子量聚乙烯复合材料及性能研究

李彦晓, 张岩, 何雪莲()

华东理工大学化工学院，多相结构材料化学工程重点实验室，上海 200237

收稿日期:2020-02-10 出版日期:2020-08-26 发布日期:2020-08-26
基金资助:
国家自然科学基金面上项目(51573048)

Preparation and Performance of PE⁃HD/PE⁃UHMW Blends by Ultrasonic⁃assisted Twin⁃screw Extrusion

Yanxiao LI, Yan ZHANG, Xuelian HE()

China Shanghai Key Laboratory of Multiphase Material Chemical Engineering, School of Chemical Engineering East China University of Science and Technology, Shanghai 200237, China

Received:2020-02-10 Online:2020-08-26 Published:2020-08-26
Contact: Xuelian HE E-mail:hexl@ecust.edu.cn

摘要/Abstract

摘要：

利用超声辅助双螺杆挤出机制备高密度聚乙烯（PE-HD）/超高分子量聚乙烯（PE-UHMW）复合材料，并考察PE-UHMW含量对复合材料流变性能、结晶行为及力学性能的影响。结果表明，当PE-UHMW的含量不超过2.0 %（质量分数，下同）时，PE-UHMW在PE-HD基体内均匀分散，不存在相分离；由于PE-UHMW的相对分子质量非常大，分子链非常长，缠结程度大，其分子链松驰时间较长，有利于形成结晶前驱体，直至成核，随着PE-UHMW含量的增加，有利于成核，晶核数目明显增加，同时，PE-UHMW与PE-HD的缠结程度变大，约束了PE-HD分子链的运动，使其吸附于晶核心表面，分子链折叠排列形成结晶，最终复合材料体系的结晶度逐渐增大，片晶增厚；加入PE-UHMW后，复合材料的屈服强度、拉伸强度和断裂伸长率均明显提高。

关键词: 聚乙烯, 流变, 结晶动力学, 力学性能

Abstract:

Ultra high molecular weight polyethylene (PE-UHMW) and high density polyethylene (PE-HD) have a similar molecular composition and structure, and therefore they have relatively good compatibility. In this paper, the PE-HD/PE-UHMW blends were prepared by ultrasonic-assisted twin-screw extrusion, and the effect of PE-UHMW content on the crystallization behavior, compatibility and final mechanical properties of the blends was investigated. The results indicated that the PE-UHMW phase achieved a uniform dispersion without phase separation in the PE-HD matrix at the content lower than 2.0 wt%. As the content of PE-UHMW increases, there is a significant increase in nucleation number for the PE-UHMW domain, which is beneficial to crystallization. Moreover, the degree of entanglement also increases gradually with an increase of PE-HD content. This makes more PE-HD molecules involved in the chain?folding crystallization with the nucleus formed by PE-UHMW, leading to a gradual increase of crystallinity. As a result, the yield strength, breaking strength and elongation at break of the blends were improved significantly with an increase of PE-UHMW content.

Key words: polyethylene, rheology, crystallization kinetics, mechanical property

中图分类号:

TQ325.1⁺2

李彦晓, 张岩, 何雪莲. 超声辅助双螺杆机制备高密度聚乙烯/超高分子量聚乙烯复合材料及性能研究[J]. 中国塑料, 2020, 34(8): 9-16.

Yanxiao LI, Yan ZHANG, Xuelian HE. Preparation and Performance of PE⁃HD/PE⁃UHMW Blends by Ultrasonic⁃assisted Twin⁃screw Extrusion[J]. China Plastics, 2020, 34(8): 9-16.

图/表 14

样品名称	PE?HD的含量/%	PE?UHMW的含量/%
H/UH300?0.5	99.5	0.5
H/UH300?1.0	99.0	1.0
H/UH300?1.5	98.5	1.5
H/UH300?2.0	98.0	2.0

表1 PE?HD/PE?UHMW复合材料的质量配比

Tab.1 The mass ratio of PE?HD/PE?UHMW in the blends

图1 超声辅助双螺杆挤出机结构示意图

Fig.1 The scheme of the ultrasonically?aided twin screw extruder

图2 连续自成核?退火温度控制程序

Fig.2 SSA program

图3 应变为10 %时，H/UH300复合材料储能模量和损耗模量的频率扫描曲线

Fig.3 G' and G" of H/UH300 composites versus frequency

图4 H/UH300体系的复数黏度随频率的变化曲线

Fig.4 Complex viscosity of H/UH300 blends versus frequency

图5 不同PE?UHMW含量的H/UH300复合材料的Van Gurp曲线

Fig.5 Van Gurp curves for the H/UH300 composites with different PE?UHMW content

图6 H/ UH300复合材料的Han曲线

Fig.6 Han curves for the blends of H/ UH300

图7 H/UH300复合材料的Cole?Cole曲线

Fig.7 The Cole?Cole plot for the H/UH300 composites

图8 H/UH300复合材料在116 ℃时的Avrami曲线

Fig.8 The isothermal crystallization curves and Avrami plots of H/UH300 composite at 116 ℃

样品	115 ℃			116 ℃
样品	n	K	L_c/nm	n	K	L_c/nm
PE?HD	2.24	0.52	23.7	1.89	2.18	23.7
H/UH300?0.5	2.30	0.58	25.9	1.90	2.28	25.4
H/UH300?1.0	2.32	0.61	27.3	1.94	2.36	27.6
H/UH300?1.5	2.41	0.78	27.8	2.14	2.29	27.3
H/UH300?2.0	3.32	1.56	28.3	2.34	3.77	28.5

表2 结晶温度为115 ℃和116 ℃时动力学常数K、n和Lc

Tab.2 K, n and Lc of the composites at the cooling rate of 115 ℃ and 116 ℃

图9 不同PE?UHMW含量的H/UH300复合材料的SSA曲线

Fig.9 The SSA curves of the composites

图10 不同PE?UHMW含量的复合材料的片晶厚分布图

Fig.10 The lamellar thickness and distribution of the composites

图11 H/UH300复合材料断面的SEM照片

Fig.11 SEM of the H/UH300 blends

样品	屈服强度/MPa	断裂强度/MPa	断裂伸长率/%
PE?HD	28.3	17.2	120
H/UH300?0.5	32.4	20.5	760
H/UH300?1.0	29.0	18.6	600
H/UH300?1.5	29.2	18.6	590
H/UH300?2.0	29.4	19.2	550

表3 PE?HD/PE?UHMW复合材料的力学性能

Tab.3 Mechanical properties of PE?HD/PE?UHMW blends

参考文献 11

1	BARKER M B, BOWMAN J, BEVIS M. The Performance and Causes of Failure of Polyethylene Pipes Subjected to Constant and Fluctuating Internal Pressure Loadings [J]. Journal of Materials Science, 1983, 18(4): 1 095⁃1 118.
2	JANG B C，HUH S Y，JANG J G. Mechanical Properties and Morphology of the Modified PE⁃HD/Starch Reactive Blend [J]. Journal of Applied Polymer Science, 2010, 82(13):3 313⁃3 320.
3	CHANG B P, AKIL H M, NASIR R M,et al. Mechanical Properties of Zeolite⁃reinforced PE⁃UHMW Composite for Implant Application[J]. Procedia Engineering, 2013, 68(12):88⁃94.
4	LONG Y, FAN P, LIU P. Improving Polarity of PE⁃UHMW Through γ⁃Ray Irradiation and Its Application[J]. Journal of Macromolecular Science Part B, 2010, 49(3):563⁃573.
5	CHEN J，YANG W，YU G P. Continuous Extrusion and Tensile Strength of Self⁃reinforced PE⁃HD/PE⁃UHMW Sheet[J]. Journal of Materials Processing Technology, 2008, 202(1):165⁃169.
6	BOSCOLETTO B A, FRANCO R, SCAPIN M. An Investigation on Rheological and Impact Behavior of High Density and Ultra⁃high Molecular Weight Polyethylene Mixtures [J]. European Polymer Journal, 1997, 33(1): 97⁃105.
7	KEUM J K, FENG Z, HSIAO B S. Formation and Stabi⁃lity of Shear⁃Induced Shish⁃Kebab Structure in Highly Entangled Melts of PE⁃UHMW/PE⁃HD Blends[J]. Macromolecules, 2008, 41(13):4 766⁃4 776.
8	SANCHEZ G, OLIVARES. Extrusion with Ultrasound Applied on Intumescent Flame Retardant Polypropylene [J]. Polymer Engineering & Science, 2013, 53(9): 2 018⁃2 026．
9	GUO S, LI Y, CHEN G, et al. Ultrasonic Improvement of RheoLgical and Processing Behaviour of LLDPE during Extrusion [J]. Polymer International, 2003, 52(1): 68⁃73.
10	ISAYEV A I, KUMAR R, LEWIS T D. Ultrasound Assisted Twin Screw Extrusion of Polymer⁃Nanocomposites Containing Carbon Nanotubes [J]. Polymer, 2009, 50(1): 250⁃260.
11	宋敏驹, 何雪莲, 刘柏平. 超声波与引发剂结合制备高熔体强度聚乙烯[J]. 合成树脂及塑料, 2016(1):32⁃36.
	SONG M J,HE X L,LIU B P. Preparation of High⁃melt⁃strength Polyethylene Through Ultrasonic Irradiation Wave Treatment Plus Radial Initiator [J]. China Synthetic Resin and Plastics, 2016(1):32⁃36.

[1]	于昌永, 辛忠. 基于六氢邻苯二甲酸盐的α/β复合成核剂对聚丙烯性能的影响[J]. 中国塑料, 2022, 36(7): 121-128.
[2]	李果, 朱惠豪, 马玉录, 王玉, 吉华建, 谢林生. 导热型微孔透气薄膜的制备及性能研究[J]. 中国塑料, 2022, 36(7): 14-20.
[3]	谭立钦, 刘伟区, 梁利岩, 王硕, 冯志强, 林家明. 含巯基聚硅氧烷改性环氧树脂的制备及性能[J]. 中国塑料, 2022, 36(7): 21-29.
[4]	徐杰, 钟进福, 童晓茜, 李广富, 付栋梁, 李城城. 端羧基修饰单宁酸/没食子酸环氧树脂复合材料的制备与性能研究[J]. 中国塑料, 2022, 36(7): 44-50.
[5]	周舒毅, 朱敏, 刘忆颖, 曹舒惠, 蔡启轩, 聂慧, 张玉霞, 周洪福. 高分子止血材料研究进展[J]. 中国塑料, 2022, 36(7): 74-84.
[6]	李凯泽, 辛勇. 改性碳纳米管增强热塑性聚氨酯复合材料的性能研究[J]. 中国塑料, 2022, 36(6): 1-5.
[7]	吴雄杰, 朱东波, 孙江波, 高龙美, 储雨, 程劲松, 谢爱迪. 聚乙烯/纳米硫酸钙粉体复合软包装应用性能研究[J]. 中国塑料, 2022, 36(6): 10-15.
[8]	雷育杰, 陈明焕, 王洁瑶, 陈旺治, 李磊. 回收聚乙烯的交联发泡及其产品性能研究[J]. 中国塑料, 2022, 36(6): 124-129.
[9]	刘伟, 吴显, 陈小澄, 成晓琼, 张纯. 羧基化填料对聚乙烯醇/纳米纤维素水凝胶力学、导电和传感性能的影响[J]. 中国塑料, 2022, 36(6): 16-23.
[10]	张文才, 郝晓刚, 李萍, 林浩, 裴强, 丰功吉, 付兆华, 于小芳. 聚乙烯接枝马来酸酐含量对废旧聚乙烯改性沥青性能的影响[J]. 中国塑料, 2022, 36(6): 24-31.
[11]	王帅, 张玉迪, 杨富凯, 徐新宇. 聚酰亚胺/多壁碳纳米管泡沫材料的制备及性能研究[J]. 中国塑料, 2022, 36(6): 39-45.
[12]	祝景云, 衣惠君, 鄢薇, 李大伟. 合成膜专用聚乙烯树脂原料的研发[J]. 中国塑料, 2022, 36(6): 77-80.
[13]	王金业, 唐博虎, 杨立宁, 谢猛, 郭泽朝, 杨光. PA12试件多射流熔融成型工艺研究[J]. 中国塑料, 2022, 36(6): 81-86.
[14]	孙文博, 信春玲, 何亚东, 翟玉娇, 闫宝瑞. 玻璃纤维增强PBT微发泡工艺对其制品泡孔结构的影响[J]. 中国塑料, 2022, 36(5): 1-7.
[15]	夏云霞, 李磊, 罗章生, 朱倩沁, 何力军. 基于闪蒸法制备再生聚乙烯无纺布及其性能研究[J]. 中国塑料, 2022, 36(5): 14-18.

超声辅助双螺杆机制备高密度聚乙烯/超高分子量聚乙烯复合材料及性能研究

Preparation and Performance of PE⁃HD/PE⁃UHMW Blends by Ultrasonic⁃assisted Twin⁃screw Extrusion

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 14

参考文献 11

相关文章 15

编辑推荐

Metrics

本文评价