Cited by 43Polymer crystallization and propertiesBlock Copolymer Self-Assemblybiodegradable polymer synthesis and properties

Interactive Crystallization of a Strongly Segregated Double Crystalline Block Copolymer with Close Crystallizable Temperatures

Nojima, Shuichi, Fukagawa, Yoshimasa, Ikeda, Hiroshi·2009·Macromolecules

Abstract

The crystallization process of a new crystalline−crystalline diblock copolymer with close crystallizable temperatures, poly(β-propiolactone)- block -linear low density polyethylene (PPL- b -PE), has been investigated using differential scanning calorimetry (DSC), synchrotron small-angle X-ray scattering (SR-SAXS), and Fourier transform infrared spectroscopy (FTIR). PPL- b -PE formed a strongly segregated microdomain structure in the melt, so that crystallization of both PPL and PE blocks was effectively confined within this structure without morphological transition. When PPL- b -PE was cooled from the microphase-separated melt at constant rates ( i.e ., nonisothermal crystallization), the PE block started to crystallize first, followed immediately by the crystallization of PPL blocks. As a result, the crystallization process of PPL blocks was overlapped with the late stage of PE crystallization (coincident crystallization), where crystallization of one block significantly affected the crystallization behavior of the other block. When PPL- b -PE was isothermally crystallized, such coincident crystallization was not observed and both blocks crystallized separately.

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Crossref · 10.1021/ma901964a

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  • In strongly segregated systems (high χN values, T_ODT > Tg > Tc), the phase segregated structure of the melt is preserved, but the amorphous block is in the glassy state, so crystallization of the crystalline block occurs under hard confinement.

    “The phase segregated structure of the melt is preserved, but in this case, the amorphous block is in the glassy state, therefore the crystallization process of the crystalline block occurs under hard confinement (the same behaviour is observed for double crystalline diblock copolymers, once the first block crystallizes, the second one crystallizes under hard confinement) [ 101 , 104 , 105 , 108 ,”

    From Fractionated crystallization in semicrystalline polymers (2021) · cites this paper as [112]

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Authors
Nojima, S., Fukagawa, Y., & Ikeda, H.
Affiliations
Tokyo Institute of Technology (JP)
Corresponding author
Nojima, Shuichi
Venue
Macromolecules
Published
2009-11-23
Volume
42
Issue
24
Pages
9515-9522
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2086766761
Cited by
43
References
52
Citations by year
2022: 1 · 2021: 4 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 6 · 2016: 4 · 2015: 6 · 2014: 5 · 2013: 3 · 2012: 7
FWCI
3.09
Type
journal article
Language
en
Open access
closed
Locations
Macromolecules (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Materials Science › Materials Chemistry › Block Copolymer Self-Assembly
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
Keywords
block copolymer crystallization, microphase separation, non-isothermal crystallization, isothermal crystallization, crystallization kinetics, microdomain structure

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