Competitive influence of atactic polystyrene and supercritical carbon dioxide on the conformation of syndiotactic polystyrene
文献类型：期刊论文
| 作者 | Ma, Wei-Ming; Yu, Jian; He, Jia-Song |
| 刊名 | Journal of polymer science part b-polymer physics
 |
| 出版日期 | 2007-07-15 |
| 卷号 | 45期号:14页码:1755-1764 |
| 关键词 | Atactic polystyrene Crystalline Polymorphism Supercritical carbon dioxide Syndiotactic polystyrene |
| ISSN号 | 0887-6266 |
| DOI | 10.1002/polb.21047 |
| 通讯作者 | He, jia-song(hejs@iccas.ac.cn) |
| 英文摘要 | The crystallization behavior of miscible syndiotactic polystyrene (sps) and atactic polystyrene (aps) blends with different sps/aps weight ratios was investigated in supercritical co2 by using fourier-transform infrared spectroscopy, differential scanning calorimetry, and wide-angle x-ray diffraction. supercritical co2 and aps exhibited different effects on the conformational change of sps and competed with each other. increasing the content of amorphous aps in the blends made its effect on the conformational change of sps gradually surpass that of supercritical co2. supercritical co2 favored the formation of the helical conformation of sps in lower temperature range and the all trans planar conformation in higher temperature range, instead of forming the latter one only in higher temperature range in ambient atmosphere. however, increasing aps content in the blends pushed the range for forming the helical conformation to lower temperature and made the all trans planar conformation dominant in aps/sps 25/75 blend after treating in supercritical co2 above 60 degrees c. the all trans planar zigzag conformation was more favorable than the helical conformation after mixing aps in sps in supercritical co2. (c) 2007 wiley periodicals, inc. |
| WOS关键词 | ALPHA-CRYSTALLINE FORM ; MISCIBLE BLENDS ; GAMMA-FORM ; LAMELLAR MORPHOLOGIES ; POLYMORPHIC CRYSTALS ; PHASE-TRANSITIONS ; MESOMORPHIC FORM ; DELTA-FORM ; CO2 ; SPECTROSCOPY |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000247763200001 |
| 出版者 | JOHN WILEY & SONS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2380030 |
| 专题 | 中国科学院大学 |
| 通讯作者 | He, Jia-Song |
| 作者单位 | 1.Chinese Acad Sci, BNLMS, Key Lab Engn Phys, Joint Lab Polymer Sci & Mat,Inst Chem, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Wei-Ming,Yu, Jian,He, Jia-Song. Competitive influence of atactic polystyrene and supercritical carbon dioxide on the conformation of syndiotactic polystyrene[J]. Journal of polymer science part b-polymer physics,2007,45(14):1755-1764. |
| APA | Ma, Wei-Ming,Yu, Jian,&He, Jia-Song.(2007).Competitive influence of atactic polystyrene and supercritical carbon dioxide on the conformation of syndiotactic polystyrene.Journal of polymer science part b-polymer physics,45(14),1755-1764. |
| MLA | Ma, Wei-Ming,et al."Competitive influence of atactic polystyrene and supercritical carbon dioxide on the conformation of syndiotactic polystyrene".Journal of polymer science part b-polymer physics 45.14(2007):1755-1764. |
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来源：中国科学院大学
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