Molecular Orientations in Flat-Elongated and Helical Lamellar Crystals of a Main-Chain Nonracemic Chiral Polyester

2000 ◽  
Vol 122 (1) ◽  
pp. 72-79 ◽  
Author(s):  
Christopher Y. Li ◽  
Stephen Z. D. Cheng ◽  
Jason J. Ge ◽  
Feng Bai ◽  
John Z. Zhang ◽  
...  
Keyword(s):  
Main Chain ◽  
Lamellar Crystals

scholarly journals Double-Twisted Helical Lamellar Crystals in a Synthetic Main-Chain Chiral Polyester Similar to Biological Polymers. Volume 32, Number 2, January 26, 1999, pp 524−527.

2000 ◽  
Vol 33 (2) ◽  
pp. 647-647
Author(s):  
Chritopher Y. Li ◽  
Donghang Yan ◽  
Stephen Z. D. Cheng ◽  
Feng Bai ◽  
Tianbai He ◽  
...  
Keyword(s):  
Main Chain ◽  
Biological Polymers ◽  
Lamellar Crystals

Helical single-lamellar crystals thermotropically formed in a synthetic nonracemic chiral main-chain polyester

1999 ◽  
Vol 60 (18) ◽  
pp. 12675-12680 ◽  
Author(s):  
Christopher Y. Li ◽  
Donghang Yan ◽  
Stephen Z. D. Cheng ◽  
Feng Bai ◽  
Jason J. Ge ◽  
...  
Keyword(s):  
Main Chain ◽  
Lamellar Crystals

Double-Twisted Helical Lamellar Crystals in a Synthetic Main-Chain Chiral Polyester Similar to Biological Polymers

1999 ◽  
Vol 32 (2) ◽  
pp. 524-527 ◽  
Author(s):  
Chritopher Y. Li ◽  
Donghang Yan ◽  
Stephen Z. D. Cheng ◽  
Feng Bai ◽  
Tianbai He ◽  
...  
Keyword(s):  
Main Chain ◽  
Biological Polymers ◽  
Lamellar Crystals

Temperature-dependent photoluminescence from MEH-PPV and MEH-OPPV containing oxadiazole in the main chain

2006 ◽  
Vol 84 (1-2) ◽  
pp. 203-206 ◽  
Author(s):  
F. Kong ◽  
X.L. Wu ◽  
G.S. Huang ◽  
R.K. Yuan ◽  
C.Z. Yang ◽  
...  
Keyword(s):  
Main Chain ◽  
Temperature Dependent ◽  
Temperature Dependent Photoluminescence

scholarly journals Internal constraints and arrested relaxation in main-chain nematic elastomers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Takuya Ohzono ◽  
Kaoru Katoh ◽  
Hiroyuki Minamikawa ◽  
Mohand O. Saed ◽  
Eugene M. Terentjev
Keyword(s):  
Mechanical Properties ◽  
Main Chain ◽  
Polymer Networks ◽  
Nematic Order ◽  
Nematic Elastomers ◽  
Nematic Director ◽  
Highly Nonlinear ◽  
Nonlinear Mechanical ◽  
Liquid Crystal Elastomers ◽  
Memory Applications

AbstractNematic liquid crystal elastomers (N-LCE) exhibit intriguing mechanical properties, such as reversible actuation and soft elasticity, which manifests as a wide plateau of low nearly-constant stress upon stretching. N-LCE also have a characteristically slow stress relaxation, which sometimes prevents their shape recovery. To understand how the inherent nematic order retards and arrests the equilibration, here we examine hysteretic stress-strain characteristics in a series of specifically designed main-chain N-LCE, investigating both macroscopic mechanical properties and the microscopic nematic director distribution under applied strains. The hysteretic features are attributed to the dynamics of thermodynamically unfavoured hairpins, the sharp folds on anisotropic polymer strands, the creation and transition of which are restricted by the nematic order. These findings provide a new avenue for tuning the hysteretic nature of N-LCE at both macro- and microscopic levels via different designs of polymer networks, toward materials with highly nonlinear mechanical properties and shape-memory applications.

Synthesis of polyethers containing cyclodipeptide moiety in the main chain

2001 ◽  
Vol 39 (6) ◽  
pp. 927-933 ◽  
Author(s):  
Tadayuki Kunisaki ◽  
Kimiko Kawai ◽  
Keiko Hirohata ◽  
Kazuhiro Minami ◽  
Koichi Kondo
Keyword(s):  
Main Chain
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