超细重质CaCO_3填充改性LLDPE/mPE薄膜的研究  

Study on LLDPE/mPE Thin Film Blown Modified by the Super-fine Ground CaCO_3

作　　者：邵鹏[1] 曾宪通[1] 刘述梅[1] 赵建青[1] 蒋文真[2] 麦裕良[3] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]广州合诚实业有限公司,广东广州510620 [3]广东省化学工业公共实验室广东省石油化工研究院,广东广州510030

出　　处：《广东化工》2007年第6期5-8,共4页Guangdong Chemical Industry

基　　金：广东省经贸委粤港招标项目(20060106-2);广州市科技攻关计划项目(2006Z2-D2031)

摘　　要：采用超细重质碳酸钙(CaCO3)对LLDPE/mPE(80/20)进行改性,加入5wt%CaCO3使薄膜的落镖冲击强度提高13.2%,断裂伸长率提高约5%,拉伸强度也略有提高;碳酸钙用量为30wt%时,薄膜的撕裂强度几乎不变,落镖冲击强度下降11.0%,纵向和横向拉伸强度降低24.7%和29.4%;碳酸钙用量进一步增加,力学性能迅速下降。研究发现,在实验范围内,碳酸钙还可以降低共混树脂熔融扭矩,改善加工条件,采用TGA、SEM等分别对改性体系的热稳定性、分散状况进行了研究。The LLDPE/mPE （80/20） film was modified by adding super-fine ground CaCO3. The results indicated that the film＇s dart impact strength increased by 13.2%, the elongation at break increased by about 5%, the tensile strength increased a little extent by incorporating into 5wt% CaCO3. When the content of CaCO3 reached 30wt%, the film＇s tear strength remained the same, the dart impact strength deceased by 11.0%, the tensile strengths deceased by 24.7% in lengthwise direction and 29.4% in transverse direction, respectively. CaCO3 could decrease the blend＇s torque during the process under experimental conditions. The effect of CaCO3 on the blend＇s thermal properties was investigated by TGA, and the dispersion in the blends by SEM.

关 键 词：线性低密度聚乙烯 茂金属聚乙烯 碳酸钙 薄膜 

分 类 号：TQ132.32[化学工程—无机化工]