长玻纤增强PET复合材料的力学性能研究

采用自制的浸润装置，以PET浸渍长波纤，经切粒后得到长度为6mm的长纤维增强PET预浸料切片，经一定温度热处理，可得到长纤增强PET复合材料。研究了注塑样条中玻纤含量对其力学性能及玻纤长度分布的影响，并采用SEM观察了长玻纤增强PET注塑样条的断面形貌。结果表明，复合材料力学性能随玻璃纤维含量的提高均有不同程度的提高，当玻纤的质量分数在40％～50％时，力学性能基本达到最佳，且由本方法制备的长玻纤增强PET复合材料的力学性能已达到并超过了国外同类产品的水平。

Study on Mechanical Properties of Long Glass Fiber Reinforced PET Composite

Long glass fibre reinforced PET composites (LGF/PET) produced by a new melt impregnation process were injection molded to testing bars, in which long glass fibers were impregnated with PET by a self-made impregnator, and the impregnated fibers were pelleted into LGF/PET flake materials with a length of 6 mm. The effect of the glass fibre content in the testing bar on the mechanical properties and the glass fibre length distribution were studied, and SEM was used to investigating the section surface of the testing bars. The results showed that the mechanical properties of LGF/PET composites increased with the increase of the glass fibre content, and the mechanical properties were the best when the mass fraction of glass fibre was between 40% to 50%, the mechanical properties of the LGF/PET composites produced by the new melt impregnation method had attained to and exceeded those of the same products from other countries.