Mesophase and Optical Properties of Side Chain Copolyacrylate with Mesogens and OLLA Segments Side Chains

2011 ◽  
Vol 181-182 ◽  
pp. 397-400
Author(s):  
Ya Ping Liu ◽  
Zhuo Hua Li ◽  
Ling Min Sun ◽  
Run Tao Dong ◽  
Hong Ru Chen ◽  
...  
Keyword(s):  
Ring Opening ◽  
Optical Rotation ◽  
Helical Structure ◽  
Ring Opening Polymerization ◽  
Side Chain ◽  
Side Chains ◽  
Induce Effect ◽  
Phase Structures ◽  
Acrylate Esters ◽  
Phase Behaviors

Thermal properties and phase behaviors of series of newly synthesized copolyacrylate esters with oligomeric-L-LA (OLLA) segments (DP = 10-40) and mesogens as side chains were characterized. The OLLAs prepared by ring opening polymerization of L-LA with active HO-group were modified to form polymerizable acrylate esters and then copolymerized with polymerizable mesogens. The thermal behaviors of these copolyacrylate esters were studied by DSC and POM measurements and phase structures by XRD measurements. The mesogens showed very good induce effect on the formation of layered structures. CD measurements were used to determine the helical structure and the optical rotation power of the side chain copolyacrylate esters.

Thermal and Optical Properties of Main Chain Polymer Compose of Oligo-L-LA Segments and Biphenol Group

2011 ◽  
Vol 181-182 ◽  
pp. 151-155
Author(s):  
Jie Peng ◽  
Qing Bin Xue ◽  
Hong Ru Chen ◽  
Ling Min Sun ◽  
Run Tao Dong
Keyword(s):  
Optical Properties ◽  
Ring Opening ◽  
Main Chain ◽  
Optical Rotation ◽  
Helical Structure ◽  
Ring Opening Polymerization ◽  
Chain Polymer ◽  
Oh Groups ◽  
Phase Behaviors ◽  
Main Chain Polymers

Thermal properties and phase behavior of series of main chain copolymers containing oligomeric-L-LA segments (OLLA) and biphenol groups were synthesized and characterized. OLLA segments were prepared by ring opening polymerization of L-LA initiated by biphenol mesogens with active HO-group and then polymerized to form main chain polymer by the reaction pentanedioyl dichloride with the-OH groups at the free end of OLLA. Their phase behaviors were studied by using DSC and POM. XRD measurements revealed the formation of layered structures. CD measurements were used to measure the helical structure and the optical rotation power of the main chain polymers.

scholarly journals Stereoselective Ring-Opening Polymerization of Functional β-Lactones: Influence of the Exocyclic Side-Group

2021 ◽  
Author(s):  
Rama Shakaroun ◽  
Hui Li ◽  
Philippe Jéhan ◽  
Marielle Blot ◽  
Ali Alaaeddine ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Chemical Diversity ◽  
Side Chain ◽  
Side Group

Polyhydroxyalkanoates (PHAs) are a unique class of polyesters especially due to their chemical diversity imparted by their side-chain substituent that provides a handle to tune their properties, such as their...

Access to Poly-β-Peptides with Functionalized Side Chains and End Groups via Controlled Ring-Opening Polymerization of β-Lactams

2009 ◽  
Vol 131 (4) ◽  
pp. 1589-1597 ◽  
Author(s):  
Jihua Zhang ◽  
Denis A. Kissounko ◽  
Sarah E. Lee ◽  
Samuel H. Gellman ◽  
Shannon S. Stahl
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Side Chains ◽  
End Groups ◽  
Functionalized Side

Mixed Molecular Brushes with PLLA and PS Side Chains Prepared by AGET ATRP and Ring-Opening Polymerization

2006 ◽  
Vol 39 (22) ◽  
pp. 7513-7519 ◽  
Author(s):  
Dongxia Wu ◽  
Yongfang Yang ◽  
Xiaohui Cheng ◽  
Li Liu ◽  
Jia Tian ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Side Chains ◽  
Aget Atrp ◽  
Molecular Brushes

Hierarchical superstructures of norbornene-based polymers depending on dendronized side-chains

2016 ◽  
Vol 7 (33) ◽  
pp. 5304-5311 ◽  
Author(s):  
Dae-Yoon Kim ◽  
Dong-Gue Kang ◽  
Suyong Shin ◽  
Tae-Lim Choi ◽  
Kwang-Un Jeong
Keyword(s):  
Self Assembly ◽  
Ring Opening ◽  
Main Chain ◽  
The Self ◽  
Side Chain ◽  
Side Chains ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Main Chain Polymers

For understanding the self-assembly behaviours of norbornene-based main-chain polymers depending on side-chain pendants, a series of polynorbornenes containing the programmed dendrons is newly designed and successfully synthesized via ring opening metathesis polymerization.

Synthesis of Ferroelectric Liquid Crystalline Polymers by Ring Opening Polymerization

1996 ◽  
Vol 425 ◽  
Author(s):  
C. S. Hsu ◽  
C. J. Lee
Keyword(s):  
Ring Opening ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Ring Opening Polymerization ◽  
Side Chain ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Crystalline Polymers ◽  
Smectic A ◽  
Smectic C

AbstractThe synthesis of two series of side-chain liquid crystalline polyoxetanes and polyoxiranes containing 4-alkanyloxybiphenyl-4′ -yl (2S,3S)-2-chloro-3-methylvalerate side groups is presented. Differential scanning calorimetry, polarizing optical microscopy, and X-ray diffractometry reveal smectic mesomorphism for all obtained polymers. Most of the prepared polyoxetanes present smectic A and chiral smectic C phases. The polyoxetane containing tweleve methylene units in the spacer is the only one showing two enantiotropic smectic A and B phases. All of the obtained polyoxiranes display two enantiotropic smectic A and B phases. Although the polyoxetane and polyoxirane backbones are more flexible than the polymethacrylate backbone, side-chain crystallization do not occur in any of the synthesized polymers.

Invoking Side-Chain Functionality for the Mediation of Regioselectivity during Ring-Opening Polymerization of Glucose Carbonates

2020 ◽  
Vol 142 (40) ◽  
pp. 16974-16981
Author(s):  
Yue Song ◽  
Xin Yang ◽  
Yidan Shen ◽  
Mei Dong ◽  
Yen-Nan Lin ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Side Chain
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