CAJ | 학술논문

研究了聚苯撑苯并二噁唑（PBO）纤维在自然环境中的光稳定性。PBO纤维对可见光和紫外光都十分敏感,波长范围400～450 nm的可见光即可导致PBO纤维力学性能下降,而波长范围200～400 nm的紫外光可以加速PBO纤维的老化过程,同时自然环境中温度、湿度的变化将会进一步加速PBO的光老化。PBO纤维经自然湿热老化312 h后,强度保持率仅为37%,特性粘数保持率为61%,纤维取向度下降。PBO纤维大分子链发生部分断裂,表面的有序结构被破坏,是造成PBO纤维力学性能恶化的主要因素。
연구료취분탱분병이오서（PBO）섬유재자연배경중적광은정성。PBO섬유대가견광화자외광도십분민감,파장범위400～450 nm적가견광즉가도치PBO섬유역학성능하강,이파장범위200～400 nm적자외광가이가속PBO섬유적노화과정,동시자연배경중온도、습도적변화장회진일보가속PBO적광노화。PBO섬유경자연습열노화312 h후,강도보지솔부위37%,특성점수보지솔위61%,섬유취향도하강。PBO섬유대분자련발생부분단렬,표면적유서결구피파배,시조성PBO섬유역학성능악화적주요인소。
The photo stability of polybenzoxazole（PBO） fibers under natural environment was investigated. PBO fibers are sensitive both to visible and ultra violet（UV） light.Visible light with wavelength ranged from 400 nm to 450 nm can result in the decrease of mechanical properties of PBO fibers,while UV light can accelerate the aging process.And the humidity combined with heat can deteriorate the properties further.After aging under natural environment combined with heat and humidity for 321 h,the retention of tensile strength and intrinsic viscosity is only 37%and 61%respectively.The molecular chain scission,microfibril breaking,and orientation decreasing are the key factors deteriorate PBO fiber properties.