癸二酸二苯基二酰肼调控扩链改性聚乳酸的性能  

Study on performance regulation of chain-extended poly(lactic acid)foams with diphenylhydrazide sebacic acid

作　　者：王澳华 顿东星 孟瑞静 张玉霞[1,2] WANG Aohua;DUN Dongxing;MENG Ruijing;ZHANG Yuxia(China Key Laboratory of Polymer Foam Processing and Application in Light Industry,Beijing Technology and Business University,Beijing 100048,China;School of Light Industry Science and Engineering,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学中国轻工业聚合物发泡材料加工与应用重点实验室,北京100048 [2]北京工商大学轻工科学与工程学院,北京100048

出　　处：《中国塑料》2024年第11期64-69,共6页China Plastics

摘　　要：使用成核剂癸二酸二苯基二酰肼(ST-NAB3)调控扩链剂苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯(SAG)改性聚乳酸(PLA)化学接枝产物(C-PLA)的性能,并采用超临界CO_(2)制备了C-PLA-ST-NAB3发泡材料。利用偏振光学显微镜和差示扫描量热仪(DSC)、旋转流变仪、扫描电子显微镜(SEM)分别研究了不同ST-NAB3含量的C-PLA结晶性能、热性能、流变性能和发泡材料的微观结构。结果表明,ST-NAB3的加入能够显著提高C-PLA的结晶速率,减小晶体尺寸,同时增大晶体密度。随着ST-NAB3含量的增加,C-PLA的结晶度由3.2%提高到20.2%,其含量为0.3%(质量分数,下同)和0.4%时,在不同发泡温度下均能制得泡孔尺寸均一的C-PLA-ST-NAB3发泡材料。In this study,diphenylhydrazide sebacic acid(ST-NAB3)was used to regulate the properties of a chemical graft product(C-PLA)obtained from the chain-extension modification of polylactic acid(PLA)using styrene-acrylonitrile-glycidyl methacrylate(SAG)a chain extender.Then,C-PLA-ST-NAB3 foams were prepared by using supercritical CO_(2),and their crystallization performance,thermal performance,rheological behavior,foaming properties,and microstructure were investigated by polarization light microscopy,differential scanning calorimetry,rotational rheometer,and scanning electron microscopy.The results indicated that the addition of ST-NAB3 increased the crystallization rate of C-PLA foams significantly,resulting in a reduction in the crystal size but an increase in the crystal density.With an increase in the ST-NAB3 content,the crystallinity degree of the C-PLA foam increased from 3.2%to 20.2%.When the content of ST-NAB3 was 0.3 and 0.4 wt%,the C-PLA-ST-NAB3 foams with a uniform cell size could be formed at different foaming temperature.

关 键 词：聚乳酸 癸二酸二苯基二酰肼 发泡材料 结晶性能 泡孔结构 

分 类 号：TQ321[化学工程—合成树脂塑料工业]