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采用化学气相沉积聚合法制备了厚度为0.082mm的聚氯代对二甲苯膜,并将其置于80~220℃Ar气气氛中恒温2h退火。采用X-射线结构衍射仪(XRD)、扫描电子显微镜(SEM)表征了其结晶度变化和表面显微结构,并对退火前后膜的拉伸强度、透气率、透明度及雾度进行了测试。结果表明,随着退火温度升高,聚氯代对二甲苯薄膜的结晶度,拉伸强度和雾度增大,并在200℃达到最高;其断裂延伸率、透明度、气体渗透率则随之降低。
A polychlorinated p-xylene film with a thickness of 0.082 mm was prepared by chemical vapor deposition polymerization and annealed at a constant temperature of 2 h in an Ar gas atmosphere at 80-220 ° C. The changes of crystallinity and surface microstructure were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The tensile strength, air permeability, transparency and haze of the films before and after annealing were measured. The results showed that with the increase of annealing temperature, the crystallinity, tensile strength and haze of polychlorinated p-xylene films increased and reached the highest at 200 ℃. The elongation at break, transparency and gas permeability reduce.