LDPE/剑麻纤维素微晶复合材料性能研究  

Study on Properties of LDPE/SFCM Composites

作　　者：杨芳[1] 杨晶[1] 杨瑞霞[2] 周永采 陆树文[1] 李建鸣[1] 

机构地区：[1]广西师范学院化学与材料科学学院,广西南宁530001 [2]广西大学资源与冶金学院,广西南宁530004

出　　处：《塑料科技》2016年第6期23-27,共5页Plastics Science and Technology

基　　金：有机化学广西高校重点学科开放课题;广西自然科学基金项目(2014GXNSFBA118061)

摘　　要：采用熔融共混法制备低密度聚乙烯(LDPE)/剑麻纤维素微晶(SFCM)复合材料,研究了SFCM的用量对LDPE/SFCM复合材料的力学性能、维卡软化点、熔体流动速率及熔融结晶行为的影响。力学性能测试表明:SFCM的加入可明显提高基体LDPE的拉伸弹性模量、弯曲强度及模量,但降低了体系的拉伸强度。当加入3份的SFCM时,LDPE/SFCM复合材料的缺口冲击强度最大,为46.9 k J/m^2,比纯LDPE提高了33.2%。热性能、流动性能及DSC研究表明:SFCM的加入对LDPE/SFCM复合材料的维卡软化点、熔融温度及结晶温度影响不明显,但降低了复合材料的熔体流动速率,同时LDPE的结晶度明显提高。The composites of low-density polyethylene （LDPE）/sisal fiber cellulose microcrystalline （SFCM） were prepared through the melt blending method. The effects of SFCM content on the mechanical properties, vicat softening point, melt flow rate, and melt and crystallization behaviors of the LDPE/SFCM composites were investigated. The mechanical property tests show that with the addition of SFCM, the tensile elastic modulus, bending strength and bending modulus of LDPE effectively improve, but the tensile strength reduces. When the content of SFCM is 3 phr, the notched impact strength of the composites reaches to 46.9 kJ/m2, which increased by 33.2% than that of pure LDPE. Its toughness increased by 14.9%, compared with pure LDPE. The results of thermal properties, fluidity and DSC show that the addition of SFCM has slight effect on the Vicat softening point, melting temperature and crystallization temperature of LDPE/SFCM composites, the melt flow rate decreases, and the crystallinity of LDPE significantly increases.

关 键 词：低密度聚乙烯 剑麻纤维素微晶 复合材料 性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]