导热绝缘PE-LD/PE-g-MAH/h-BN泡沫塑料的制备及性能研究

doi:10.19491/j.issn.1001-9278.2020.09.005

中国塑料 ›› 2020, Vol. 34 ›› Issue (9): 27-32.DOI: 10.19491/j.issn.1001-9278.2020.09.005

导热绝缘PE-LD/PE-g-MAH/h-BN泡沫塑料的制备及性能研究

李城城, 徐杰(), 赵文坚, 黄聪, 钟进福

浙江润阳新材料科技股份有限公司技术部，浙江湖州 313105

收稿日期:2020-03-18 出版日期:2020-09-26 发布日期:2020-09-25
基金资助:
地址：北京市阜成路11 号，北京工商大学化学与材料工程学院聚合物发泡材料研究团队

Preparation and Properties of Thermally Conductive Insulating PE-LD/PE-g-MAH/h-BN Foamed Plastics

LI Chengcheng, XU Jie(), ZHAO Wenjian, HUANG Cong, ZHONG Jinfu

Zhejiang Runyang New Material Technology Co , Ltd, Huzhou 313105，China

Received:2020-03-18 Online:2020-09-26 Published:2020-09-25
Contact: XU Jie E-mail:xujie@zj-runyang.com

摘要/Abstract

摘要：

采用熔融共混法制备了一系列导热绝缘的低密度聚乙烯/马来酸酐接枝聚乙烯/六方氮化硼(PE-LD/PE-g-MAH/h-BN新型泡沫塑料，研究了相容剂PE-g-MAH的加入、h-BN含量对PE-LD/PE-g-MAH/h-BN泡沫体系导热性能、绝缘性能、力学性能及热稳定性的影响。结果表明，PE-g-MAH有利于增加PE?LD与h?BN的界面黏结，增强泡沫体系拉伸强度和断裂伸长率，显著提高其热导性能；当h-BN含量为30 %时， PE-LD/PE-g-MAH/h-BN泡沫体系的导热率为0.256 W/(m·K)，相对于PE-LD/h-BN泡沫体系的0.217 W/(m·K) 和纯PE-LD泡沫体系的0.039 W/(m·K)，热导率分别提高1.18和6.57倍，同时保持较好的绝缘性和热稳性。

关键词: 低密度聚乙烯, 氮化硼, 导热率, 力学性能, 发泡

Abstract:

A series of heat conductive and insulating foams were prepared by melt blending using low?density polyethylene (PE-LD), maleic anhydride-grafted polyethylene (PE-g-MAH) and boron nitride (h-BN) as raw materials. The effects of PE-g-MAH and h-BN on the thermal conductivity, insulation, mechanical properties and thermal stability of PE-LD/PE-g-MAH/h-BN foams were investigated. The result indicated that the foams achieved an improvement in elongation at break and tensile strength, and their thermal conductivity was also enhanced significantly due to the strong interaction between PE-LD and h-BN bridged by PE-g-MAH. The foams gained a thermal conductivity of 0.256 W/（m·K） at the h-BN content of 30 wt%, and their thermal conductivity increased by 118 % and 657 % compared to PE-LD/h-BN foam and pure PE-LD foam, respectively. Moreover, the PE-LD/PE-g-MAH /h-BN foams obtained good insulation and thermal stability.

Key words: low density polyethylene, boron nitride, heat conductive, mechanical property, foam

中图分类号:

TQ328

李城城, 徐杰, 赵文坚, 黄聪, 钟进福. 导热绝缘PE-LD/PE-g-MAH/h-BN泡沫塑料的制备及性能研究[J]. 中国塑料, 2020, 34(9): 27-32.

LI Chengcheng, XU Jie, ZHAO Wenjian, HUANG Cong, ZHONG Jinfu. Preparation and Properties of Thermally Conductive Insulating PE-LD/PE-g-MAH/h-BN Foamed Plastics[J]. China Plastics, 2020, 34(9): 27-32.

图/表 6

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7^#

8^#

9^#

10^#

100

表1 PE?LD/PE?g?MAH/h?BN实验变量配方表

Tab.1 Formula of PE?LD/PE?g?MAH/h?BN experimental variables

图1 PE?g?MAH 及h?BN对泡沫塑料拉伸性能的影响

Fig.1 Effect of PE?g?MAH and h?BN on tensile properties of foamed plastics

图2 PE?LD/h?BN 和PE?LD/PE?g?MAH/h?BN泡沫塑料的热导率

Fig.2 Thermal conductivity of PE?LD/h?BN and PE?LD/PE?g?MAH/h?BN foamed plastics

图3 PE?LD/PE?g?MAH/h?BN泡沫塑料的体积电阻率

Fig.3 Volume resistivity of PE?LD/PE?g?MAH/h?BN foamed plastics

图4 PE?LD/PE?g?MAH/h?BN泡沫塑料的TG和DTG曲线

Fig.4 TG and DTG curves of PE?LD/PE?g?MAH/h?BN foamed plastics

图5 PE?LD/PE?g?MAH/h?BN泡沫塑料的SEM 照片

Fig.5 SEM photographs of PE?LD/PE?g?MAH/H?BN foamed plastics

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导热绝缘PE-LD/PE-g-MAH/h-BN泡沫塑料的制备及性能研究

Preparation and Properties of Thermally Conductive Insulating PE-LD/PE-g-MAH/h-BN Foamed Plastics

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