硬脂酸镧对硅烷交联LLDPE热性能和力学性能的影响  

Effects of Lanthanum Stearate on the Thermal and Mechanical Properties of Silane Crosslinked LLDPE

作　　者：李红山[1,2] 张艺[2] 许家瑞[2] 

机构地区：[1]嘉应学院化学系,广东梅州514015 [2]中山大学化学与化学工程学院材料科学研究所、聚合物复合材料及功能材料教育部重点实验室,广东广州510275

出　　处：《高分子材料科学与工程》2009年第5期46-48,共3页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50273048)

摘　　要：通过热重分析(TG)、差示扫描量热分析(DSC)、维卡软化点测定及拉伸性能测试等手段研究了稀土化合物硬脂酸镧对硅烷交联线性低密度聚乙烯LLDPE(SXLLDPE)性能的影响。结果发现,添加硬脂酸镧可极大地提高SXLLDPE的热氧分解温度,当硬脂酸镧质量分数达5%时,提高幅度已接近50℃。同时,添加硬脂酸镧可使SXLLDPE凝胶部分的结晶和熔融占主导地位,但结晶度没有发生明显变化。硬脂酸镧的加入没有改变SXLLDPE的热变形行为,说明硬脂酸镧与稀土化合物和高分子链段间的相互作用没有直接关联。另外,硬脂酸镧的加入不会导致SXLLDPE的拉伸强度和断裂伸长率的明显下降。The thermal and mechanical properties of silane erosslinked LLDPE （SXLLDPE） were investigated through thermogravimetric analysis （TGA）, differential scanning calorimetry （DSC）, Vicat softening point measurements and mechanical tests. It has been found that the thermal oxidation degradation temperature of SXLLDPE oould be remarkably increased by addition of lanthanum stearate. The Vicar softening points remained unchanged with the addition of lanthanum stearate. The gel fraction of SXLLDPE filled with lanthanum stearate generally dominated in the crystallization and melting process, while the erystallinity was not changed. The tensile strength and elongation to break of SXLLDPE were not obviously affected by the addition of lanthanum stearate.

关 键 词：硅烷交联 线性低密度聚乙烯 硬脂酸镧 热性能 力学性能 

分 类 号：O614.33[理学—无机化学]