Direct Formation of Different Crystalline Forms in Butene-1/Ethylene Copolymer via Manipulating Melt Temperature
文献类型：期刊论文
| 作者 | Wang, Yaotao; Lu, Ying; Zhao, Jiayi; Jiang, Zhiyong; Men, Yongfeng |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2014-12-23 |
| 卷号 | 47期号:24页码:8653-8662 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma5019796 |
| 英文摘要 | The crystallization behavior of a butene-1/ethylene random copolymer with 9.88 mol % ethylene counits was investigated by means of differential scanning calorimetry, wide- and small-angle X-ray scattering, and polarized optical microscopy. Unlike in its homopolymer counterpart which crystallizes always into a metastable form II from the melt state, the random copolymer was found to crystallize either into form II or stable form I' directly from its melt state after being cooled down. The occurrence of either crystalline form only depended on the temperature where the crystalline material was molten before cooling down. Even though the material was brought to temperatures higher than the equilibrium melting temperature, heterogeneities of segmental segregation character were preserved which promoted massive nucleation of form I' crystallites, which makes it possible that the material is able to crystallize into pure form I'. Only if when the melt temperature was high enough where all heterogeneities of the above-mentioned character were erased can the material be crystallized into pure form II. The effect is found independent of the previous crystalline form, meaning that the helical conformation of chains in the heterogeneous melt does not affect the nucleation of stable form I'. |
| 语种 | 英语 |
| WOS记录号 | WOS:000347138300021 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/51797]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Men, Yongfeng |
| 作者单位 | Univ Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Chinese Acad Sci, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yaotao,Lu, Ying,Zhao, Jiayi,et al. Direct Formation of Different Crystalline Forms in Butene-1/Ethylene Copolymer via Manipulating Melt Temperature[J]. MACROMOLECULES,2014,47(24):8653-8662. |
| APA | Wang, Yaotao,Lu, Ying,Zhao, Jiayi,Jiang, Zhiyong,&Men, Yongfeng.(2014).Direct Formation of Different Crystalline Forms in Butene-1/Ethylene Copolymer via Manipulating Melt Temperature.MACROMOLECULES,47(24),8653-8662. |
| MLA | Wang, Yaotao,et al."Direct Formation of Different Crystalline Forms in Butene-1/Ethylene Copolymer via Manipulating Melt Temperature".MACROMOLECULES 47.24(2014):8653-8662. |
入库方式： OAI收割
来源：化学研究所
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