Scattering Function and Spinodal Transition of Linear and Nonlinear Block Copolymers Based on a Unified Molecular Model

Weichao Shi

doi:10.1007/s10118-021-2544-9

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Scattering Function and Spinodal Transition of Linear and Nonlinear Block Copolymers Based on a Unified Molecular Model

ARTICLE | Updated：2021-02-10

- Scattering Function and Spinodal Transition of Linear and Nonlinear Block Copolymers Based on a Unified Molecular Model
- Scattering Function and Spinodal Transition of Linear and Nonlinear Block Copolymers Based on a Unified Molecular Model
- Chinese Journal of Polymer Science 2021年39卷第6期页码：779-788
- Affiliations：
  
  Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Author bio：
  
  weichaoshi@nankai.edu.cn
- Funds：
  
  This research work is supported by the Fundamental Research Funds for the Central Universities, Nankai University (No. 000082) and the National Natural Science Foundation of China (No. 21973050).
- DOI：10.1007/s10118-021-2544-9
  中图分类号：
- 收稿：2020-11-29，
  
  修回：2020-12-28，
  
  录用：2020-12-30，
  
  网络首发：2021-02-10，
  
  纸质出版：2021-04-15
- Accepted：
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Shi, W. Scattering function and spinodal transition of linear and nonlinear block copolymers based on a unified molecular model. Chinese J. Polym. Sci. 2021, 39, 779–788

Weichao Shi. Scattering Function and Spinodal Transition of Linear and Nonlinear Block Copolymers Based on a Unified Molecular Model[J]. Chinese Journal of Polymer Science, 2021, 39(6): 779-788.
Shi, W. Scattering function and spinodal transition of linear and nonlinear block copolymers based on a unified molecular model. Chinese J. Polym. Sci. 2021, 39, 779–788 DOI： 10.1007/s10118-021-2544-9.

Weichao Shi. Scattering Function and Spinodal Transition of Linear and Nonlinear Block Copolymers Based on a Unified Molecular Model[J]. Chinese Journal of Polymer Science, 2021, 39(6): 779-788. DOI： 10.1007/s10118-021-2544-9.

摘要

Abstract

This work uses a block copolymer architecture [(A’B)

]

to unify the scattering function and spinodal transition of typical AB-type block copolymers. The key roles of block number

junction points and asymmetry ratios of block length are (1) to determine the form factor of each block copolymer at the molecular scale; (2) to affect the entropy loss across the spinodal transition and may result in deflection of spinodal curves. The common features are validated in typical linear and nonlinear block copolymers

including AB diblock

asymmetric A’BA triblock

miktoarm stars of AB

(AB)

(A’B)

A’BA

and multi-graft combs of (B

)

and [(A’B)

]

. The explicit scattering functions and form factors of various block copolymers can be directly applied in radiation experiments (

i.e

. neutron or X-ray scattering) to unravel the effect of molecular architecture in solution and microphase separation in disordered melt. The molecular model used in this study is also helpful to guide the chemical synthesis to explore more potentially interesting block copolymers.

关键词

Keywords

references

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