以高密度聚乙烯(HDPE 6761)为基体,松木纤维(Pine)为增强材料,MAPE(Epolene G2608)、MAPP(Exxelor VA1840)和Fusabond(WPC576D)为偶联剂,采用注塑法制备木塑复合材料(WPC),并测定了HDPE基体和不同配比WPC的热膨胀性能与冲击强度。结果表明:WPC 的冲击强度明显低于高密度聚乙烯板(HDPE),较低的冲击强度是木塑复合材料的一个主要缺点,偶联剂的加入可以提高WPC的冲击强度; WPC的热膨胀系数明显低于HDPE,虽然偶联剂的加入可以较好地抑制热膨胀,但WPC的热膨胀系数的主要影响因素是木纤维的加入量及塑料基体的种类。
Abstract
Influences of different coupling agent and ratio of modifier content on impact strength and various linear thermal expansion coefficients of composites were investigated in this paper. The results showed low impact strength was the major drawback of WPC in many end-use applications. The variation of impact strength of composites with coupling agents is caused by coupling agents. The different matrix and ratio of modifier content exerted different influences on the various linear thermal expansion coefficients of composites in three temperature zones. The reduction of the LTEC appear in HDPE/Pine composites was caused by adding filler and coupling agent.
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基金
收稿日期:2011-08-12 修回日期:2012-04-16 基金项目:美国农业部/能源部生物质启动研究项目(68-3A75-6-508); 江苏省优势学科建设工程优秀研究生学位论文培养计划 第一作者:黄润州,博士生。*通信作者:WU Qinglin, 教授。E-mail:runzhouhuang@gmail.com。引文格式:黄润州,WU Qinglin,张洋. 偶联剂对木塑复合材料冲击强度与热膨胀性能的影响[J]. 南京林业大学学报:自然科学版,2012,36(3):91-95.
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