【摘 要】
：
研究了碳纤维前驱体丙烯腈-衣康酸共聚物(PAN-IA) /N,N-二甲基甲酰胺(DMF)溶液的流变学性质,聚合物的黏均分子量在4～10万之间,IA的质量含量约5％；考察了质量浓度在15％～30％、温度在30℃～90℃范围内溶液的流变性质。发现对数零切黏度与浓度、分子量及温度倒数存在良好的线性关系,而且在100 1/s以内的剪切速率下,溶液接近牛顿流体的行为,然而随黏度的升高而表现出剪切变稀行为。对
【机 构】
：
浙江大学化学工程联合国家重点实验室,浙江省杭州市310027 浙江大学化学工程联合国家重点实验室,
论文部分内容阅读
研究了碳纤维前驱体丙烯腈-衣康酸共聚物(PAN-IA) /N,N-二甲基甲酰胺(DMF)溶液的流变学性质,聚合物的黏均分子量在4～10万之间,IA的质量含量约5％；考察了质量浓度在15％～30％、温度在30℃～90℃范围内溶液的流变性质。发现对数零切黏度与浓度、分子量及温度倒数存在良好的线性关系,而且在100 1/s以内的剪切速率下,溶液接近牛顿流体的行为,然而随黏度的升高而表现出剪切变稀行为。对比了DMF、DMSO(二甲基亚砜)、DMAc(N,N-二甲基乙酰胺)作为溶剂时溶液的流变特性,结果显示DMF的溶解能力最好,黏度最低。研究还表明,单体衣康酸的引入能改善PAN溶液的流变性质,降低溶液的黏度。
其他文献
MEMS Foundry Services for High-Volume MEMS Applications MEMS sensors increasingly are being used in electronic applications to sense the world around us, and more uses are being discovered every day.W
To promote the international collaboration in education, research, especially in academic-industry cooperation, The University of Tokyo (U-Tokyo) launched an International University-Industry Cooperat
In recent years, significant interest has grown in the use of Deep Reactive Ion Etching (DRIE) technique for biomedical applications.Micro needle arrays for transdermal drug delivery/blood monitoring
Research & Development in Space and Navigation will always emphasize on cost consideration, obviously, size and weight of the applied devices will be seriously focused on since they are directly propo
As is known to all, the internet of things is very popular around the world, but in fact it is still in its infancy.Therefore, only after hatching and incubation, the baby will grow into healthy child
通过熔融纺丝法制备了热致性液晶(TLCP)/聚苯硫醚(PPS)原位成纤共混纤维,采用差示扫描量热仪(DSC),通过非等温结晶方法研究了TLCP微纤对PPS基体结晶行为的影响,并用Jeziorny模型描述了非等温动力学。研究表明,TLCP/PPS原位成纤共混纤维的非等温结晶动力学过程能够使用Jeziorny模型来描述。此外,采用扫描电镜(SEM)观察了挤出共混物表面形貌及共混纤维的TLCP微纤结构。