超临界CO_2作用下BAPC的诱导结晶和熔融行为Induced Crystallization and Melting Behavior of BAPC Treated by Supercritical CO_2
丁晓娟,丁一刚,周春平,胡雄,谭涛
摘要(Abstract):
采用DSC,WAXD研究了在超临界CO2作用下,温度、压力和共溶剂对双酚A型聚碳酸酯(BAPC)的结晶和熔融行为的影响。结果表明,超临界CO2显著降低BAPC的结晶温度;少量共溶剂的加入使BAPC的结晶更加完善,BAPC晶体是单斜晶子;超临界CO2诱导结晶并未引起预聚体官能团的改变。
关键词(KeyWords): 超临界二氧化碳;诱导结晶;聚碳酸酯;共溶剂
基金项目(Foundation): 湖北省教育厅重点项目资助(项目编号2003B002)
作者(Author): 丁晓娟,丁一刚,周春平,胡雄,谭涛
参考文献(References):
- 1 Chiou J S,Barlow J W,Paul D R.Polymer crystallizationinduced by sorption of CO2gas.J Appl Polym Sci,1985,30:3 911~3 924
- 2 Chiou J S,Barlow J W,Paul D R.Plasticization of glassypolymer by CO2.Appl Polym Sci,1985,30:2 633~2 642
- 3 Goel S K,Beckman E J.Plasticization of poly(methyl meth-acrylate)(PMMA)networks by supercritical carbondiox-ide.Polymer,1993,34:1 410~1 417
- 4吕军,黄锐.双酚A型聚碳酸酯结晶行为研究进展.华东理工大学学报(自然科学版),2006,32(2):225~234
- 5廖霞,李刚,孙兴华等.超临界CO2及共溶剂作用下聚碳酸酯的结晶和熔融行为.化学学报,2003,61(10):1 697~1 699
- 6 Ji G,Xue G,Ma J,et al.Concentration dependence ofcrystallinity of polycarbonate by shock-cooling and subse-quent freeze drying of its various solutions.Polymer,1996,37:3 255~3 258
- 7 Mendez G and Miiller A J.Evidences of the crystallinememory and recrystallization capacity of bisphenol-A poly-carbonate.Journal of Thermal Analysis,1997,50:593~602
- 8 Xianbo Hu,Alan J Lesser.Enhanced crystallization of bis-phenol-A polycarbonate by nano-scale clays in the presenceof supercritical carbon dioxide.Polymer,2004,45:2 333~2 340
- 9 Taniguchi M,Kamihira M,Kobayashi T.Effect of treat-ment with supercritical carbon dioxide on enzymatic activity.Agric Biol Chem,1987,51(2):593~594
- 10毛忠贵.生物工业下游技术.北京:中国轻工业出版社,1999.107~125