摘要
以均聚物聚甲基丙烯酸甲酯(PMMA)和二嵌段共聚物聚苯乙烯-聚甲基丙烯酸甲酯(PS-b-PMMA)共混物为考察对象,利用超临界二氧化碳(scCO_2)发泡技术制备纳米发泡材料。通过改变PMMA的相对分子质量以及PS-b-PMMA的含量来调控共混物中胶束的尺寸和密度,系统研究其对材料发泡行为的影响。实验结果表明,对于纯PMMA发泡体系来说,随着PMMA相对分子质量的增大,发泡材料的泡孔孔径逐渐减小,但可发泡性变差;当PS-b-PMMA含量为5%时,共混物的可发泡性得到改善,泡孔孔径更加均匀,但泡孔孔径增大;将PS-b-PMMA含量提高到10%时,得到孔径更小、更均匀的纳米发泡材料。
In this paper, the nano-size foams were obtained by using supercritical carbon dioxide (scCO2) foaming of polymethyl methacrylate (PMMA) and the block copolymer polystyrene-b-poly(methyl methcrylate)(PS-b-PMMA) blends. The size and density of micelles in the blends were controlled by adjusting the molecular weight of PMMA and the content of PS-b-PMMA, and effects on the foaming behavior of materials were studied. For the neat PMMA foaming, with the increase of the molecular weight of PMMA, the cell size of the foams gradually decreases, and the foaming performance becomes worse. With the addition of 5% PS-b-PMMA into the PMMA matrix, the foaming performance is improved and the cell morphology becomes uniform. However, the cell size becomes larger than that of neat one. When the content of PS-b-PMMA is further increased to 10%, the uniform nano-size foams are successfully obtained.
作者
王王番
郑晓平
吴志昂
龚莉雯
包锦标
王市伟
Fan Wang;Xiaoping Zheng;Zhi’ang Wu;Liwen Gong;Jinbiao Bao;Shiwei Wang(Department of Materials Science and Chemical Engineering ,Ningbo University ,Ningbo 315211, China;National Center for International Research of Micro-Nano Molding Technology & Key Laboratoryfor Micro Molding Technology of Henan Province ,Zhengzhou University ,Zhengzhou 450001,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2019年第4期33-39,共7页
Polymer Materials Science & Engineering
基金
宁波大学王宽诚幸福基金
宁波市自然科学基金资助项目(2017A610045)
