Rhythmic Growth-Induced Ring-Banded Spherulites with Radial Periodic Variation of Thicknesses Grown from Poly(epsilon-caprolactone) Solution with Constant Concentration
文献类型：期刊论文
| 作者 | Wang, Zongbao1; Alfonso, Giovanni C.2; Hu, Zhijun3; Zhang, Jidong1; He, Tianbai1 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2008-10-28 |
| 卷号 | 41期号:20页码:7584-7595 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma8005697 |
| 英文摘要 | Birefringent ring-banded spherulites with radial periodic variation of thicknesses were grown from poly(epsilon-caprolactone) (PCL) solutions under conditions for which the Solution concentration was held constant during the whole development of the morphology. The as-grown ring-banded spherulites were investigated by optical (OM) and atomic force (AFM) microscopies, by transmission electron microscopy (TEM) of samples sectioned parallel to the plane of film, and also by electron diffraction (ED) and grazing incidence X-ray diffraction (GIXD) techniques. The results indicate that the concentric rings in the birefringent ring-banded spherulites. as well as those in the nonbirefringent ring-banded spherulites, are a manifestation of periodic variation of thicknesses along the radius. The development of the ring-banded spherulites with radial periodic variation of thicknesses is due to periodic diffusion-induced rhythmic growth associated with periodical change in the concentration gradient in polymer solution with constant concentration. The morphological features reflect the competition between the diffusion flux of polymer chains in solution, J, and spherulitic growth with radial growth velocity. V, which call be characterized by the parameter delta = J/V. The effects of crystallization conditions, including polymer molecular weight, initial solution concentration, and solvent evaporation rate, oil the formation of ring-banded spherulites with radial periodic variation of thicknesses were studied. |
| 语种 | 英语 |
| WOS记录号 | WOS:000260255800049 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63161]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | He, Tianbai |
| 作者单位 | 1.Chinese Acad Sci, Grad Univ, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Genoa, Dept Chem & Ind Chem, I-16146 Genoa, Italy 3.Univ Catholique Louvain, Lab Chim & Phys Hauts Polymeres POLY, B-1348 Louvain, Belgium |
| 推荐引用方式 GB/T 7714 | Wang, Zongbao,Alfonso, Giovanni C.,Hu, Zhijun,et al. Rhythmic Growth-Induced Ring-Banded Spherulites with Radial Periodic Variation of Thicknesses Grown from Poly(epsilon-caprolactone) Solution with Constant Concentration[J]. MACROMOLECULES,2008,41(20):7584-7595. |
| APA | Wang, Zongbao,Alfonso, Giovanni C.,Hu, Zhijun,Zhang, Jidong,&He, Tianbai.(2008).Rhythmic Growth-Induced Ring-Banded Spherulites with Radial Periodic Variation of Thicknesses Grown from Poly(epsilon-caprolactone) Solution with Constant Concentration.MACROMOLECULES,41(20),7584-7595. |
| MLA | Wang, Zongbao,et al."Rhythmic Growth-Induced Ring-Banded Spherulites with Radial Periodic Variation of Thicknesses Grown from Poly(epsilon-caprolactone) Solution with Constant Concentration".MACROMOLECULES 41.20(2008):7584-7595. |
入库方式： OAI收割
来源：化学研究所
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