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利用自制的微纳层叠共挤成型装备预制EPDM/PP多层复合材料,通过动态硫化制备共挤和共混2种EPDM/PP热塑性弹性体,测试EPDM/PP热塑性弹性体的力学性能,并利用扫描电子显微镜观察EPDM/PP热塑性弹性体相态结构。结果表明:共挤法能够明显减小橡胶相颗粒粒径的大小,且粒径均匀,并提高了橡胶相颗粒的分散均匀性,共挤法制备的EPDM/PP热塑性弹性体的力学性能总体优于共混法。
EPDM / PP multi-layer composites were prepared by self-made micro / nano-layer coextrusion molding equipment. Two kinds of EPDM / PP thermoplastic elastomers were prepared by dynamic vulcanization. The mechanical properties of EPDM / PP thermoplastic elastomers were tested. Scanning electron microscopy was used to observe the phase structure of EPDM / PP thermoplastic elastomer. The results show that the co-extrusion method can obviously reduce the particle size of the rubber phase particles and have uniform particle size and improve the dispersion uniformity of the rubber phase particles. The overall mechanical properties of the EPDM / PP thermoplastic elastomer prepared by the co-extrusion method are excellent In the blending method.