关键词: 微纳层叠, 热塑性聚氨酯, 硅橡胶, 热塑性硫化橡胶

Abstract: 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.

Key words: micro-nano lamination, thermoplastic polyurethane, silicon rubber, thermoplastic vulcanizate