Liquid crystal polyester derived from phenylene-naphthalene monomers and one or more comonomers display an improved balance of properties, including low melt viscosity, fast cycle time in molding, very low mold shrinkage, high tensile and/or flexural strength, solvent resistance, excellent barrier properties, low water absorption, low thermal expansion coefficient, excellent thermostability, and/or low flammability. The phenylene-naphthalene monomers are
The one or more comonomers include 4-hydroxybenzoic acid, 2-hydroxy-6-naphthoic acid, terephthalic acid, isophthalic acid, and derivatives and combinations thereof.
由苯-
萘单体和一个或多个共聚单体衍生的液晶聚酯表现出改进的性能平衡,包括低熔融粘度、成型快速、非常低的模具收缩率、高拉伸和/或弯曲强度、溶剂抗性、优异的障壁性能、低吸
水性、低热膨胀系数、优异的热稳定性和/或低易燃性。苯-
萘单体为
4-羟基
苯甲酸、
2-羟基-6-萘甲酸,
对苯二甲酸、异苯二
甲酸及其衍
生物和组合物。