scholarly journals Synchronous Control of Chain Length/Sequence/Topology for Precision Synthesis of Cyclic Block Copolymers from Monomer Mixtures

2021 ◽  
Vol 143 (9) ◽  
pp. 3318-3322
Author(s):  
Michael L. McGraw ◽  
Ryan W. Clarke ◽  
Eugene Y.-X. Chen
Keyword(s):  
Block Copolymers ◽  
Chain Length ◽  
Synchronous Control ◽  
Cyclic Block ◽  
Precision Synthesis

scholarly journals Chain elongation suppression of cyclic block copolymers in lamellar microphase-separated bulk

2004 ◽  
Vol 121 (2) ◽  
pp. 1129-1132 ◽  
Author(s):  
Y. Matsushita ◽  
H. Iwata ◽  
T. Asari ◽  
T. Uchida ◽  
G. ten Brinke ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Chain Elongation ◽  
Cyclic Block

RAFT without an “R-Group”: From Asymmetric Homo-telechelics to Multiblock Step-Growth and Cyclic Block Copolymers

2021 ◽  
Vol 54 (17) ◽  
pp. 7732-7742
Author(s):  
Karen Hakobyan ◽  
Christopher S. P. McErlean ◽  
Markus Müllner
Keyword(s):  
Block Copolymers ◽  
Cyclic Block ◽  
Step Growth

Elastomeric Polyether-Ester Block Copolymers. I. Structure-Property Relationships of Tetramethylene Terephthalate/Polyether Terephthalate Copolymers

1977 ◽  
Vol 50 (4) ◽  
pp. 688-703 ◽  
Author(s):  
J. R. Wolfe
Keyword(s):  
Phase Separation ◽  
Melting Point ◽  
Block Copolymers ◽  
Low Temperature ◽  
Chain Length ◽  
Chemical Structure ◽  
High Water ◽  
Structure Property ◽  
Tear Strength ◽  
Structure Property Relationships

Abstract The properties of elastomeric tetramethylene terephthalate/polyether terephthalate copolymers have been related to the chemical structure, chain length, and concentration in the copolymers of the PTMEG-, PEG-, and PPG-derived polyether units. Low-temperature properties and tear strength are dependent on all three polyether-related variables. Melting point, hardness, and stress at 100% elongation appear to be independent of polyether structure. Polyether glycols of low MW volatilize during copolymer preparation. High-MW polyethers tend to crystallize when present in the copolymers. Polyether glycols of intermediate MW (∼ 1000) yield copolymers with the best resistance to low-temperature stiffening. Copolymer synthesis is most difficult with PPG as the polyether glycol. Inherent viscosities are low, and phase separation occurs at lower polyether MW than with PTMEG or PEG. The PEG-based copolymers exhibit high water swell, particularly at intermediate and high PEG MW. The PTMEG-based copolymers are easiest to synthesize and exhibit the best overall combination of properties.

Precision Synthesis of Block Copolymers of 2-Methoxyethyl Vinyl Ether with Styrene Derivatives and Preparation of Highly Thermosensitive Films

2015 ◽  
Vol 72 (7) ◽  
pp. 486-490
Author(s):  
Tomoya YOSHIZAKI ◽  
Arihiro KANAZAWA ◽  
Shokyoku KANAOKA ◽  
Sadahito AOSHIMA
Keyword(s):  
Block Copolymers ◽  
Vinyl Ether ◽  
Styrene Derivatives ◽  
Precision Synthesis

ASSOCIATION STRUCTURES OF MIXED BLOCK COPOLYMERS OF DIFFERENT POLAR CHAIN LENGTH

2000 ◽  
Vol 21 (1) ◽  
pp. 79-95 ◽  
Author(s):  
Stig E. Friberg ◽  
Jennifer L. Barber ◽  
Zhiqiang Zhang ◽  
Patricia A. Aikens
Keyword(s):  
Block Copolymers ◽  
Chain Length ◽  
Mixed Block
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