摘要
文中用同步辐射光源对聚乙醇酸(PGA)挤出棒材的切片进行广角X射线散射(WAXS)和小角X射线散射(SAXS)表征,研究聚乙醇酸棒材在挤出成型后优选的退火条件,以尽可能消除内应力,改善棒材后续的机械加工性。WAXS结果表明,高温更有利于微观应变的减小,但较高温时晶粒尺寸会随退火时间的延长而减小。SAXS结果表明,高温更有利于取向程度的减小,退火时间对取向程度的影响明显弱于退火温度。综合各数据建立目标函数,并利用响应面分析法进行分析。结果表明,在实验范围内,PGA棒材的优选退火条件为200℃退火2h。
Slices of poly(glycolic acid)(PGA)extruded rods were characterized by wide angle X-ray scattering(WAXS)and small angle X-ray scattering(SAXS)using a synchrotron radiation light source,and the optimal annealing conditions of PGA rods after extrusion were studied to eliminate internal stress and improve the subsequent machinability of the rods.The WAXS results indicate that high temperature is more advantageous to thereductionofmicro-strain,butthecrystalgrain size decreases with increasing annealing time at higher temperatures.The SAXS results indicate that high temperature is more conducive to decreasing the degree of orientation,and the effects of annealing time on the degree of orientation is significantly weaker than that of annealing temperature.The objective functions were established by integrating various data and analyzed through Response Surface Methodology.The results show that the optimal annealing conditions for PGA rods within the range of the experimental conditions studied are annealing at 200℃for 2 h.
作者
骆佳伟
周炳
王洪学
田雨川
陈明明
胡永峰
Jiawei Luo;Bing Zhou;James H.Wang;Yuchuan Tian;Mingming Chen;Yongfeng Hu(Sinopec Shanghai Research Institute of Petrochemical Technology Co.,Ltd.,Shanghai 201208,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2024年第4期79-92,共14页
Polymer Materials Science & Engineering
关键词
聚乙醇酸
退火
同步辐射光源
X射线散射
响应面分析法
polyglycolic acid
annealing
synchrotron radiation light source
X-ray scattering
response surface methodology