Reversible Lamellar Periodic Structures Induced by Sequential Crystallization/Melting in PBS-co-PCL Multiblock Copolymer
文献类型：期刊论文
| 作者 | Huang, Miaoming; Dong, Xia; Wang, Lili; Zheng, Liuchun; Liu, Guoming; Gao, Xia; Li, Chuncheng; Mueller, Alejandro J.; Wang, Dujin |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | FEB 13 2018 |
| 卷号 | 51期号:3页码:1100-1109 |
| 英文摘要 | Reversible periodic structures in a symmetric poly(butylene succinate)-co-poly(e-caprolactone) (PBS-co-PCL) multiblock copolymer have been detected for the first time. A phase-segregated structure can be observed under the phase contrast optical microscope at 150 degrees C, but it has no significant effect on the subsequent crystallization behavior of the PBS component, which can break out at lower temperatures (i.e., 82 degrees C) forming spherulites that contain the molten PCL component within them. During PBS chains crystallization at 82 degrees C, two peaks are detected by SAXS experiments. The high-q peak corresponds to a periodic structure formed within PBS rich domains consisting of PBS lamellae and amorphous regions containing PBS and molten PCL chains. The low-q peak arises from a periodic structure formed within PCL-rich domains consisting of PBS lamellae and thick amorphous layers needed to accommodate the large fraction of molten PCL chains at 82 degrees C. When the temperature is decreased to 36 degrees C, the PCL component crystallizes within the PBS spherulitic template, and an alternating double crystalline layer structure of PCL and PBS forms, which leads to a decreased intensity of the low-q peak and an increased intensity of the high-q peak. If the temperature is increased again, the PCL crystals remelt and the high-q peak can still be observed, while the low-q peak becomes stronger again, confirming the reversibility of the periodic structures. Based on the results obtained, a schematic morphological model of the reversible periodic structures in the crystallization/melting process is proposed. |
| WOS记录号 | WOS:000425473600047 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38784]  |
| 专题 | 化学研究所_其它 |
| 推荐引用方式 GB/T 7714 | Huang, Miaoming,Dong, Xia,Wang, Lili,et al. Reversible Lamellar Periodic Structures Induced by Sequential Crystallization/Melting in PBS-co-PCL Multiblock Copolymer[J]. MACROMOLECULES,FEB ,51(3):1100-1109. |
| APA | Huang, Miaoming.,Dong, Xia.,Wang, Lili.,Zheng, Liuchun.,Liu, Guoming.,...&Wang, Dujin.(FEB ).Reversible Lamellar Periodic Structures Induced by Sequential Crystallization/Melting in PBS-co-PCL Multiblock Copolymer.MACROMOLECULES,51(3),1100-1109. |
| MLA | Huang, Miaoming,et al."Reversible Lamellar Periodic Structures Induced by Sequential Crystallization/Melting in PBS-co-PCL Multiblock Copolymer".MACROMOLECULES 51.3(FEB ):1100-1109. |
入库方式： OAI收割
来源：化学研究所
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