Effect of molecular weight and film thickness on the crystallization and microphase separation in polystyrene-block-poly(L-lactic acid) thin films at the early stage
文献类型：期刊论文
| 作者 | Wei YH ; Pan CY ; Li BY ; Yu XH ; Han YC |
| 刊名 | chinese journal of polymer science
 |
| 出版日期 | 2011 |
| 卷号 | 29期号:3页码:325-335 |
| 关键词 | SEMICRYSTALLINE DIBLOCK COPOLYMERS SURFACE-INDUCED ORIENTATION ORDER-DISORDER TRANSITION ULTRATHIN POLYMER-FILMS BLOCK-COPOLYMERS PATTERN-FORMATION TEMPERATURE GROWTH TRANSFORMATION MORPHOLOGIES |
| ISSN号 | 0256-7679 |
| 通讯作者 | yu xh |
| 中文摘要 | we investigated the effects of molecular weight and film thickness on the crystallization and microphase separation in semicrystalline block copolymer polystyrene-block-poly(l-lactic acid) (ps-b-plla) thin films, at the early stage of film evolution (when t (g) < t < t (odt)) by in situ hot stage atomic force microscopy. for ps-b-plla 1 copolymer which had lower molecular weight and higher plla fraction, diffusion-controlled break-out crystallization started easily. for ps-b-plla 2 with higher molecular weight, crystallization in nanometer scales occurs in local area. after melting of the two copolymer films, islands were observed at the film surface: ps-b-plla 1 film was in a disordered phase mixed state while ps-b-plla 2 film formed phase-separated lamellar structure paralleling to the substrate. crystallization-melting and van der waals forces drove the island formation in ps-b-plla 1 film. film thickness affected the crystallization rate. crystals grew very slowly in much thinner film of ps-b-plla 1 and remained almost unchanged at long time annealing. the incompatibility between ps and plla blocks drove the film fluctuation which subsequently evolved into spinodal-like morphology. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000289115600007 |
| 公开日期 | 2012-06-11 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/44684]  |
| 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 | Wei YH,Pan CY,Li BY,et al. Effect of molecular weight and film thickness on the crystallization and microphase separation in polystyrene-block-poly(L-lactic acid) thin films at the early stage[J]. chinese journal of polymer science,2011,29(3):325-335. |
| APA | Wei YH,Pan CY,Li BY,Yu XH,&Han YC.(2011).Effect of molecular weight and film thickness on the crystallization and microphase separation in polystyrene-block-poly(L-lactic acid) thin films at the early stage.chinese journal of polymer science,29(3),325-335. |
| MLA | Wei YH,et al."Effect of molecular weight and film thickness on the crystallization and microphase separation in polystyrene-block-poly(L-lactic acid) thin films at the early stage".chinese journal of polymer science 29.3(2011):325-335. |
入库方式： OAI收割
来源：长春应用化学研究所
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