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采用自行合成的分子两端、一端带有NA端基和两端都不带NA端基的三种齐聚物,以及化学组成相同、分子链长不同的齐聚物和高聚物通过物理共混法对LP-15树脂进行增韧。比较了齐聚物的端基结构、分子量大小对LP-15树脂耐热性、冲击强度的影响,讨论了其增韧机理。结果表明:所有增韧体系中增韧剂与LP-15间均具有很好的相容性,且保持了LP-15树脂原有良好的耐热性。但分子带NA端基与不带NA端基的齐聚物相比,后者的增韧效果更好;当分子两端均不带NA端基时,分子链长的高聚物的增韧效果优于分子链短的齐聚物。
Using self-synthesized molecules at both ends, one end with NA end groups and both ends without NA end groups of three oligomers, and the chemical composition of the same molecular chain length of different oligomers and polymers by physical Mixed method of LP-15 resin toughening. The effects of terminal structure and molecular weight of oligomer on the heat resistance and impact strength of LP-15 resin were compared. The toughening mechanism was discussed. The results show that all the toughening systems have good compatibilities with LP-15 and maintain the good heat resistance of LP-15 resin. However, the NA terminal of the molecular band is better than the oligomer without NA terminal group, and the toughening effect of the polymer with long molecular chain length The effect is better than the oligomer short oligomer.