腰果酚接枝黄麻纤维不饱和聚酯复合材料的力学性能及界面调控

Mechanical Properties of Jute Fiber Grafted Cardanol Unsaturated Polyester Composites and Interface Regulation

用甲苯二异氰酸酯与腰果酚(CNSL)合成大分子偶联剂接枝黄麻纤维。以接枝的黄麻纤维为增强体,通用的不饱和聚酯树脂为基体,采用热压方式制备复合材料。比较了纯饱和聚酯树脂、5%CNSL增韧的不饱和聚酯树脂、25%碱处理的黄麻纤维不饱和聚酯树脂复合材料和25%的CNSL接枝黄麻纤维不饱和聚酯树脂复合材料的拉伸强度和冲击强度。结果表明,CNSL接枝于黄麻纤维上;CNSL的加入能提高材料的韧性,黄麻纤维能提高材料的拉伸强度而不能提高材料韧性;25%CNSL接枝的黄麻纤维不饱和聚酯树脂能提高材料的拉伸强度和韧性,25%CNSL接枝的黄麻纤维增强含5%CNSL的不饱和聚酯复合材料,其冲击强度为12.10 kJ/m^2。

A macromolecular coupling agent, which was prepared from toluene diisocyanate （TDI） and cardanol （CNSL）, was grafted on jute fibers, the obtained fiber was used as reinforcement in composites of unsaturated polyester resin （UPR）. The tensile strength, elongation at break, and impact strength of pure UPR, 5% CNSL toughening UPR, 25% of alkali-treated jute fiber UPR composites, and 25% grafted jute fiber UPR, 25% grafted jute fiber and 5% CNSL UPR composites were compared. It was found that the addition of CNSL improved the toughness of the composite, jute fibers improved the tensile strength. 25% CNSL grafted jute UPR could improve both the tensile strength and toughness. 25% CNSL grafted jute fiber and 5 % CNSL toughened UPR composite provided a toughness of 12.10 kJ/m2.