光引发原位聚合聚丙烯酸酯树脂/玻纤预浸料的制备与研究

PREPARATION AND STUDY OF PHOTOINITIATED IN SITU POLYMERIZED POLYACRYLATE/GLASS FIBER PREPREG

热塑性复合材料具有较高的抗损性、抗冲击能力,因此得到了迅速发展,但是热塑性树脂基体与增强材料之间的浸渍问题严重阻碍了其推广。为了有效改善热塑性复合材料的界面性能,以甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸缩水甘油酯为单体,以单向玻璃纤维为增强材料,采用紫外光引发为聚合条件进行原位聚合,制备了聚丙烯酸酯树脂/玻纤预浸料。通过热压法将预浸料制备成复合材料,对复合材料的热稳定性、树脂含量、力学性能和微观形貌进行了研究。实验结果表明:聚丙烯酸酯树脂的热分解温度随GMA含量的增加而增加;玻璃化转变温度随GMA含量的增加而降低;复合材料的弯曲强度和拉伸强度随GMA含量的增加呈现出先增加后降低的趋势,并在GMA含量为20%时达到最大值,分别为861.4 MPa和780.9MPa;通过复合材料微观形貌的观察表明树脂和纤维结合紧密,达到了良好的浸渍效果。

Thermoplastic composite materials with high damage resistance and impact resistance obtained a rapid development,but the problems of impregnation between thermoplastic resin matrix and reinforcing materials hindered the promotion of thermoplastic composite materials. In order to improve the interface performance of thermoplastic composites,polyacrylate resin/glass fiber prepreg was fabricated by in-situ polymerization under the conditon of UV light,with methyl methacrylate,butyl acrylate,glycidyl methacrylate as monomer,with the unidirectional glass fiber as the reinforcing material. Composite materials were prepared by hot pressing. The composite resin content,thermal stability,mechanical properties and microstructure of composite were studied. The experimental results show that the thermal decomposition temperature of polyacrylate resin increases with the increase of GMA content. The resin content is stable in 30%. The glass transition temperature decreased with the increase of GMA content. The tensile strength and the flexural strength showed a trend of increasing at first and then decreasing with the increase of GMA content,and reached a maximum value at the GMA content of 20%,with the values of which were861. 4 MPa and 780. 9 MPa,respectively. The observation of the micro morphology of the composite showed that the resin and fiber were compact,and good impregnating effect was achieved.