增容剂对PVDF/PUR-T复合材料的性能影响

采用流延成膜法制备了硅烷偶联剂KH–560和端氨基液体丁腈橡胶(ATBN)协同改性的聚偏氟乙烯(PVDF)/聚醚型热塑性聚氨酯弹性体(PUR–T)复合材料,初步探讨了单一增容剂(KH–560或ATBN)含量、复配增容剂含量与比例及成膜温度等条件对PVDF/PUR–T复合材料力学性能的影响,深入研究了复合材料的结晶性能、热稳定性能和亲/疏水性能。结果表明,与单一增容剂相比,复配增容剂的引入明显提高了复合材料的力学性能,并且当复配增容剂添加量为10%,复配比KH–560/ATBN=3/1,成膜温度为50℃时,其与PVDF/PUR–T基体间的界面粘结性明显得到改善,改性后复合材料断裂伸长率达到273%。PUR–T与复配增容剂的加入抑制了PVDF的结晶,复合材料的结晶度降低,但仍具有良好的热稳定性能,且疏水性得到提高。

Inlfuence of Compatilizer on Properties of PVDF/PUR-T Composites

Silane coupling agent KH–560 and amino-terminated liquid nitrile rubber (ATBN) modified polyvinylidene fluoride (PVDF)/polyether thermoplastic polyurethane elastomer (PUR–T) composites were prepared by KH–560 and ATBN combined with PVDF/PUR–T as matrix by solution casting. The effect of the content of single compatibilizer(KH–560 or ATBN),the content and the proportion of the compatibilizers compounds and film forming temperature on mechanical properties of the composites were preliminarily discussed. The crystallization,thermal,hydrophobic and hydrophilic performances of the composites were deep researched. The results show that compared with the single compatibilizer,the compatibilizer compounds significantly improve the mechanical properties of the composites. When the content of the compatibilizer compounds is 10%,compound ratio of KH–560/ATBN is 3/1,film formation temperature is 50℃,the interfacial adhesion between compatibilizers and PVDF/PUR–T is obviously improved,the elongation at break of the modified composites reach maximum 273%. PUR–T and the compatilizer compounds can inhibit crystallization of the composites and decrease the crystallinity of the composites,but the composite still retain good thermal stability and hydrophobic performances.