ACM/PP热塑性弹性体的制备及其阻尼性能研究

Preparation and damping properties of ACM/PP thermoplastic elastomers

以PP等材料作为塑料组分,以丙烯酸酯橡胶(ACM)、氯丁橡胶(CIIR)等制得的硫化胶作为橡胶组分,采用动态硫化的方法制得ACM/PP热塑性弹性体,并对其进行流变性、力学性能、表面形貌和动态热机械分析。研究结果表明,添加10份经过改性的白云母(1250目)、10份EPDM-g-MAH作为增容剂,以及松香、酚醛树脂作为增粘树脂,均能提高ACM/PP热塑性弹性体的力学性能。分析ACM/PP热塑性弹性体的表面形貌发现,添加EPDM-g-MAH和酚醛树脂能够提高弹性体中各组分的相容性,弹性体中白炭黑和片状白云母在基体中分散较为均匀、聚集体少。添加了白云母、EPDM-g-MAH、松香、酚醛树脂后,所制得的热塑性弹性体具有较宽的阻尼温域和较高的阻尼性能。在-60~70℃,使用酚醛树脂制备的ACM/PP热塑性弹性体阻尼性能更佳。

ACM/PP thermoplastic elastomers were prepared by dynamic vulcanization method using PP and other materials as plastic components and vulcanized rubber made from ACM and BIIR as rubber components.The rheological properties,mechanical properties,surface morphology and damping properties of ACM/PP thermoplastic elastomer were analyzed.The results showed that the mechanical properties of ACM/PP thermoplastic elastomers could all be improved by adding 10phr modified muscovite(1250 mesh),10phr EPDM-g-MAH as compatibilizer,and rosin and phenolic resin as viscosity resins.Analysis of the surface morphology of ACM/PP thermoplastic elastomer revealed that the compatibility of the components of the elastomer was improved by adding EPDM-g-MAH and phenolic resin,resulting in a more uniform dispersion of the silica and flaky muscovite in the matrix with fewer aggregates.With the addition of muscovite,EPDM-g-MAH,rosin and phenolic resin,the thermoplastic elastomers had wide damping temperature ranges and high damping properties.The damping property of ACM/PP thermoplastic elastomer prepared with phenolic resin was better at-60 to 70℃.