采用马来酸酐接枝乙烯一辛烯共聚物(POE-g-MA)对CaS04晶须/尼龙6(CSW/PA6)共混物增韧改性,研究了csw/PA6和CSW/POE-g-MA/PA6复合材料的力学性能、热性能、形貌和加工性能.适量添加CSW可同时提高PA6的刚性和韧性.与纯PA6性能比较,10％CSW/PA6的拉伸强度、弯曲强度、弯曲模量和冲击强度分别增大7.5％、9.1％、21.1％和11.6％;当CSW含量增至30％,CSW/PA6的韧性明显降低.POE-g_MA可促进PA6基体中csw的均匀分散,增强CSW与PA6的界面粘附,提高CSW/PA6 (30/70)的冲击韧性.源于CSW和POE-g-MA的协同作用,CSW/POE-g-MA/PA6 (30/5/65)的冲击强度和弯曲模量与纯PA6相比较,分别提高了36.8％和22.1％,拉伸和弯曲强度接近纯PA6.
Maleic anhydride grafted polyethylene-octene copolymer (POE-g-MA) was used to toughen calcium sulfate whisker/nylon 6 (CSW/PA6) composites,and mechanical,thermal,morphological'properties and processing performance of CSW/PA6 and CSW/POE-g-MA/PA6 composites were studied.The results indicated that the addition of appropriate CSW could increase both the stiffness and toughness of PA6.Compared with those of pure PA6,tensile strength,flexural strength,flexural modulus and notched impact strength of 10％CSW/PA6 composites increased by 7.5％,9.1％,21.1％ and 11.6％,respectively.However,when CSW content increased to 30％,the impact strength of PA6 decreased significantly.The presence of POE-g-MA promoted the homogeneous distribution of CSW in PA6 matrix,also enhanced the interfacial adhesion between CSW and PA6,resulting in significant improvement of impact strength of CSW/PA6 (30/70) composites.Due to the synergistic effect of CSW and POE-g-MA,the notched impact strength and flexural modulus of CSW/POE-g-MA/PA6 (30/5/65) composites increased by 36.8％ and 22.1％ compared with pure PA6,and its tensile and flexural strength were close to those of pure PA6.
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