摘要
利用微纳层叠挤出设备良好的分布分散混合作用,制备了聚氨酯/硅橡胶(TPU/MVQ)热塑性硫化橡胶(TPV),研究了制备方法、动态硫化温度、螺杆转速、橡塑比、相容剂种类及含量对TPV性能的影响。结果表明,与普通共混相比,微纳层叠加工制备的TPV在拉伸强度和断裂伸长率上分别提升了12.4%、12.1%;硫化温度190℃、螺杆转速200 r/min时,TPV力学性能最佳,拉伸强度、断裂伸长率、硬度、压缩永久变形分别为6.69 MPa、363.8%、57.6 A、31.5%;随着橡胶含量的增加,TPV拉伸强度、断裂伸长率、硬度下降,弹性回复性能、耐老化性能、耐油性能提升;相容剂硅烷改性聚氨酯(TPSiU)和乙烯丙烯酸甲酯共聚物(EMA)最佳用量分别为10份和5份,与EMA相比,TPSiU作为相容剂时,材料弹性回复性能、耐油性能更优,而EMA对TPV的断裂伸长率提升作用明显。
Using the good distribution,dispersion,and mixing effect of micro-nano lamination extrusion equipment,polyurethane/silicone rubber thermoplastic vulcanized rubber(TPV)was prepared,and the effects of processing methods,dynamic vulcanization temperature,screw speed,rubber-plastic ratio,compatibility agent type,and content on the performance as-prepared TPV were studied.The results indicated that compared to the ordinary blending processing,the tensile strength and elongation at break of the TPV prepared by using micro-nano lamination technology were increased by 12.4%and 12.1%,respectively.When the vulcanization temperature was 190℃and the screw speed was 200 r/min,TPV exhibited the optimal mechanical properties,and its tensile strength,elongation at break,hardness and compression set were 6.69 MPa,363.8%,57.6 A and 31.5%,respectively.The tensile strength,elongation at break,hardness of TPV decreased with an increase in the rubber content,but its elastic recovery performance,aging resistance,and oil resistance were improved.The optimal dosages of silane modified polyurethane(TPSiU)and ethylene methyl acrylate copolymer(EMA)as compatibilizers were 10 phr and 5 phr,respectively.Compared to EMA,the TPV with TPSiU achieved better elastic recovery performance and oil resistance performance was better.However,the use of EMA for TPV increased the elongation at break significantly.
作者
罗讴阳
韩顺涛
杨帆
阎华
廖文泉
马秀清
LUO Ouyang;HAN Shuntao;YANG Fan;YAN Hua;LIAO Wenquan;MA Xiuqing(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2023年第5期9-14,共6页
China Plastics
关键词
微纳层叠
热塑性聚氨酯
硅橡胶
热塑性硫化橡胶
micro-nano lamination
thermoplastic polyurethane
silicon rubber
thermoplastic vulcanizate