离聚物Surlyn对高韧高强GF/PET复合材料性能影响研究

Study on the Effect of Ionomer Surlyn on Properties of High Toughness and High Strength GF/PET Composites

采用离聚物沙林树脂(Surlyn)对聚对苯二甲酸乙二醇酯(PET)/玻璃纤维(GF)/乙基-丙烯酸甲酯-甲基丙烯酸缩水甘油酯三元共聚物(EMG)/乙烯-甲基丙烯酸酯弹性体(EMA)四元强韧复合体系进一步增韧改性,并研究了不同含量Surlyn对材料力学性能、热性能、结晶性能及冲击断面形貌的影响。结果表明,Surlyn的加入会进一步提高PET/GF/EMG/EMA复合体系的韧性,0.5%时冲击强度出现最高值,呈现最优刚性-韧性平衡;Surlyn能改善玻纤与PET基体之间的界面性能,但随着Surlyn含量的增加,断面形貌从韧性断裂变为脆性断裂,材料强度逐渐下降。同时材料的结晶度随着Surlyn含量增加逐渐提高,添加到1.5%时,对结晶速度的提升效果有限;Surlyn能提高材料热变形温度,但高含量Surlyn又对材料热变形温度问题起着降低作用,在Surlyn含量为0.5%~1.5%时,材料具有相对较高的热变形温度。以上结果表明,Surlyn含量在0%~1%的材料具有最佳的综合性能。

Ionomer Surlyn was introduced to toughen the polyethylene terephthalate(PET )/glass fiber(GF )/ethyl-methyl acrylate-glycidyl methacrylate terpolymer(EMG )/ethylene-methacrylate elastomer(EMA)blends.The influence of the Surlyn contents on the mechanical properties,thermal properties,crystallization Behavior and fractured surface morphology of blends were investigated.The results show that the toughness of PET/GF/EMG/EMA composite is further improved by Surlyn.The impact strength could achieve the highest value at 0.5%,which could present the optimal rigidity-toughness balance.Surlyn could improve the interfacial properties between glass fibers and PET matrix,however the fracture morphology of PET/GF/EMG/EMA could convert from toughness fracture to brittle fracture as Surlyn contents increase,and the strength of the composites decreases gradually.At the same time,the crystallinity of the material increases gradually with the increase of Surlyn contents.When the contents of Surlyn are 1.5%,the increasing-effect of the crystallization rate is limited.Surlyn could increase the thermal deformation temperature of the material,but the thermal deformation temperature of the material could be reduced at the high content of Surlyn.When the content of Surlyn is 0.5%~1.5%,the material has relatively high thermal deformation temperature.The above all results show that the composite material has the best comprehensive properties,when the contents of Surlyn content is 0%~1%.