Helical single-lamellar crystals thermotropically formed in a synthetic nonracemic chiral main-chain polyester
文献类型：期刊论文
| 作者 | Li CY ; Yan DH ; Cheng SZD ; Bai F ; Ge JJ ; Calhoun BH ; He TB ; Chien LC ; Harris FW ; Lotz B |
| 刊名 | physical review b
 |
| 出版日期 | 1999 |
| 卷号 | 60期号:18页码:12675-12680 |
| 关键词 | SMECTIC LIQUID-CRYSTAL POLYETHYLENE SPHERULITES DEFECTS PHASES MELT |
| ISSN号 | 1098-0121 |
| 通讯作者 | cheng szd |
| 中文摘要 | phase structures and transformation mechanisms of nonracemic chiral biological and synthetic polymers are fundamentally important topics in understanding their macroscopic responses in different environments. it has been known for many years that helical structures and morphologies can exist in low-ordered chiral liquid crystalline (lc) phases. however, when the chiral liquid crystals form highly ordered smectic liquid crystal phases, the helical morphology is suppressed due to the crystallization process. a double-twisted morphology has been observed in many liquid crystalline biopolymers such as dinoflaggellate chromosomes (in prorocentrum micans) in an in vivo arrangement. helical crystals grown from solution have been reported in the case of bombyx mori silk fibroin crystals having the beta modification. this study describes a synthetic nonracemic chiral main-chain lc polyester that is able to thermotropically form helical single lamellar crystals. flat single lamellar crystals can also be observed under the same crystallization condition. moreover, flat and helical lamellae can coexist in one single lamellar crystal, within which one form can smoothly transform to the other. both of these crystals possess the same structure, although translational symmetry is broken in the helical crystals. the polymer chain folding direction in both flat and helical lamellar crystals is determined to be identical, and it is always along the long axis of the lamellae. this finding provides an opportunity to study the chirality effect on phase structure, morphology, and transformation in condensed states of chiral materials. [s0163-1829(99)01042-5]. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000083765400026 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://202.98.16.49/handle/322003/21525]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li CY,Yan DH,Cheng SZD,et al. Helical single-lamellar crystals thermotropically formed in a synthetic nonracemic chiral main-chain polyester[J]. physical review b,1999,60(18):12675-12680. |
| APA | Li CY.,Yan DH.,Cheng SZD.,Bai F.,Ge JJ.,...&Lotz B.(1999).Helical single-lamellar crystals thermotropically formed in a synthetic nonracemic chiral main-chain polyester.physical review b,60(18),12675-12680. |
| MLA | Li CY,et al."Helical single-lamellar crystals thermotropically formed in a synthetic nonracemic chiral main-chain polyester".physical review b 60.18(1999):12675-12680. |
入库方式： OAI收割
来源：长春应用化学研究所
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