制备了硫酸钙晶须(CSW)增强低密度聚乙烯(LDPE)(LDPE/CSW)复合材料,考察了CSW用量对复合体系的界面结构、抗拉性能、熔融和结晶特性以及热分解行为的影响规律。结果表明,CSW在LDPE基体中分散均匀且界面结合良好,提高了抗拉强度和弹性模量,但降低了断裂伸长率和拉伸韧度,在CSW用量为15%(wt,质量分数)制得的LDPE/CSW复合材料的抗拉强度为13.18MPa,弹性模量为158.98MPa,断裂伸长率为167.53%,拉伸韧度为20.02MJ/m3;CSW的存在对LDPE相的熔融和结晶温度影响甚微,但使LDPE/CSW复合材料的结晶度降低和热稳定性得到提高。
Calcium sulfate whisker (CSW) reinforced low density polyethylene (LDPE)(LDPE/CSW) composites were prepared.The effects of CSW dosage on the interfacial structure,tensile properties,melting and crystallization properties,and thermal decomposition behavior of the composites were investigated.The results showed that CSW was uniformly dispersed in the LDPE matrix and had good interfacial bonding,which improved the tensile strength and elastic modulus,but reduced the elongation at break and tensile toughness.The tensile strength,elastic modulus,elongation at break and tensile toughness of LDPE/CSW prepared with 15wt% CSW content were 13.18MPa,158.98MPa,167.53% and 20.02MJ/m3 respectively.The presence of CSW had little effect on the melting and crystallization temperature of the LDPE phase,but the crystallinity and thermal stability of the LDPE/CSW were improved.
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基金资助
安徽省教育厅科研重大项目(KJ2015ZD18);国家自然基金面上项目(51775001);安徽省博士后研究人员科研项目(2014B006)
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