EFFECT OF MOLECULAR WEIGHT AND FILM THICKNESS ON THE CRYSTALLIZATION AND MICROPHASE SEPARATION IN POLYSTYRENE-<italic style="font-style: italic">BLOCK</italic>-POLY(L-LACTIC ACID) THIN FILMS AT THE EARLY STAGE

Yu-han Wei; Cai-yuan Pan; Bin-yao Li; Xin-hong Yu; Yan-chun Han

doi:10.1007/s10118-011-1040-z

Your Location：

Home >

Browse articles >

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

Paper | Updated：2021-06-21

- 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 Vol. 29, Issue 3, Pages: 325-335(2011)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Changchun 130022, China
  b.Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  **Xin-hong Yu (于新红), E-mail: xhyu@ciac.jl.cn
- Funds：
- DOI：10.1007/s10118-011-1040-z
  CLC：
- Received：13 April 2010，
  
  Revised：2010-06-12，
  
  Accepted：22 June 2010，
  
  Published：2011
- Accepted：
Scan QR Code
Yu-han Wei, Cai-yuan Pan, Bin-yao Li, 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. DOI: 10.1007/s10118-011-1040-z.
DOI：

Yu-han Wei, Cai-yuan Pan, Bin-yao Li, 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. DOI: 10.1007/s10118-011-1040-z. DOI：

摘要

Abstract

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-

-PLLA) thin films

at the early stage of film evolution (when

ODT

) by

in situ

hot stage atomic force microscopy. For PS-

-PLLA 1 copolymer which had lower molecular weight and higher PLLA fraction

diffusion-controlled break-out crystallization started easily. For PS-

-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-

-PLLA 1 film was in a disordered phase mixed state while PS-

-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-

-PLLA 1 film. Film thickness affected the crystallization rate. Crystals grew very slowly in much thinner film of PS-

-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.

关键词

Keywords

references

Views

191

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

Crystallization Behavior of Disproportionately High and Low Molecular Weight PEO Blends

Two-way Shape Memory Effect of Polycaprolactone-based Polyurethane via Synergistic Role of Hydrogen Bonding and Crystallization Tuned by Malic Acid

Regulation of Microphase Separation in Bio-based Thermoplastic Polyurethanes Driven by Hard Segment Content

Spontaneous Gauged O(N) Symmetry Breaking in Polymer Crystallization

Circularly Polarized Luminescence Based on Helical Polymers: Structure-Property Relationships and Regulation Mechanisms

Related Author

Li Li

Jun-teng Liu

Zhong-jie Ren

Shou-ke Yan

Xue-Qing Li

Shuai Lu

Jun-Jie Tan

Bo Lv

Related Institution

Department of Chemistry and Chemical Engineering, Heze University

Beijing Key Laboratory of Membrane Science & State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology

School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology

School of Textile Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technology, Wuhan Textile University

Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Hubei Normal University

⁰

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

DOI：10.1007/s10118-011-1040-z

摘要

Abstract

关键词

Keywords

references