Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)
文献类型：期刊论文
| 作者 | Kurz, Ricardo1; Schulz, Martha1; Scheliga, Felix2; Men, Yongfeng3; Seidlitz, Anne1; Thurn-Albrecht, Thomas1; Saalwaechter, Kay1 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2018-08-14 |
| 卷号 | 51期号:15页码:5831-5841 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/acs.macromol.8b00809 |
| 英文摘要 | This work focuses on the influence of amorphous-phase entanglements on the semicrystalline morphology of poly(epsilon-caprolactone). This polyester is classified as crystal-fixed; i.e., it displays no translational chain dynamics in the crystals. We study a wide range of well-entangled samples with molecular weights up to several million using polarization microscopy to assess the lamellar growth rate, small-angle X-ray scattering and proton time-domain NMR to characterize the morphology, and proton multiple-quantum NMR, auxiliary carbon-13 NMR, rheology, and tensile deformation to assess the entangled chain dynamics in the melt and semicrystalline states. We demonstrate a significant increase in the density of entanglements in the amorphous phase relative to the melt. The dependencies of our observables on crystallization temperature and molecular weight suggest that entanglements control the thickness of the amorphous layers. This is rationalized by an only slowly relaxing exclusion zone with enhanced entanglement density acting as an entropically repulsive layer between adjacent lamellae. |
| 语种 | 英语 |
| WOS记录号 | WOS:000442185700038 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42457]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Saalwaechter, Kay |
| 作者单位 | 1.Martin Luther Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Germany 2.Univ Hamburg, Inst Tech & Makromol Chem, Bundesstr 45, D-20146 Hamburg, Germany 3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Renmin St 5625, Changchun 130022, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kurz, Ricardo,Schulz, Martha,Scheliga, Felix,et al. Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)[J]. MACROMOLECULES,2018,51(15):5831-5841. |
| APA | Kurz, Ricardo.,Schulz, Martha.,Scheliga, Felix.,Men, Yongfeng.,Seidlitz, Anne.,...&Saalwaechter, Kay.(2018).Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone).MACROMOLECULES,51(15),5831-5841. |
| MLA | Kurz, Ricardo,et al."Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)".MACROMOLECULES 51.15(2018):5831-5841. |
入库方式： OAI收割
来源：化学研究所
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