Main-Chain Boron-Containing Oligophenylenes via Ring-Opening Polymerization of 9-H-9-Borafluorene

2011 ◽  
Vol 133 (12) ◽  
pp. 4596-4609 ◽  
Author(s):  
Alexander Hübner ◽  
Zheng-Wang Qu ◽  
Ulli Englert ◽  
Michael Bolte ◽  
Hans-Wolfram Lerner ◽  
...  
Keyword(s):  
Ring Opening ◽  
Main Chain ◽  
Ring Opening Polymerization

Construction of polyphosphoesters with the main chain of rigid backbones and stereostructures via organocatalyzed ring-opening polymerization

2020 ◽  
Vol 11 (20) ◽  
pp. 3475-3480
Author(s):  
Yu-Jia Zheng ◽  
Guan-Wen Yang ◽  
Bo Li ◽  
Guang-Peng Wu
Keyword(s):  
Ring Opening ◽  
Main Chain ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
System P ◽  
Organic Catalyst

A highly stereoregular polyphosphoester with a rigid cyclohexylene structure in the main chain was constructed via ring-opening polymerization (ROP) in the presence of an organic catalyst system.

scholarly journals Ring-Opening Polymerization of Cyclic Phosphonates: Access to Inorganic Polymers with a PV–O Main Chain

2019 ◽  
Vol 141 (7) ◽  
pp. 2894-2899 ◽  
Author(s):  
Marius I. Arz ◽  
Vincent T. Annibale ◽  
Nicole L. Kelly ◽  
John V. Hanna ◽  
Ian Manners
Keyword(s):  
Ring Opening ◽  
Main Chain ◽  
Ring Opening Polymerization ◽  
Inorganic Polymers

Synthesis of main chain sulfur-containing aliphatic polycarbonates by organocatalytic ring-opening polymerization of macrocyclic carbonates

2019 ◽  
Vol 10 (38) ◽  
pp. 5191-5199 ◽  
Author(s):  
Bingkun Yan ◽  
Jiaqian Hou ◽  
Chao Wei ◽  
Yan Xiao ◽  
Meidong Lang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Main Chain ◽  
Ring Opening Polymerization ◽  
Highly Active ◽  
Sulfur Containing

The first application of organocatalysts is reported to achieve highly active and living ring-opening polymerization (ROP) of thioether-based macrocyclic carbonates for preparing well-defined main chain thioether functional APCs.

scholarly journals Research Progress of Biodegradable Polyester Polyols Based on Ring-Opening Polymerization of Cyclohexene Carbonate

2020 ◽  
Vol 26 (3) ◽  
pp. 323-332
Author(s):  
Xuemei WANG ◽  
Xiang GUI ◽  
Yingping QI ◽  
Yongfeng SHEN ◽  
Hua LI
Keyword(s):  
Mechanical Properties ◽  
Ring Opening ◽  
Main Chain ◽  
Ring Opening Polymerization ◽  
Raw Material ◽  
Research Progress ◽  
Flexible Structure ◽  
Biological Stability ◽  
Thermal Mechanical Properties ◽  
Weather Resistance

The polycarbonate polyols(PCD) obtained by ring-opening polymerization of a general cyclic monomer is mostly a linear flexible structure, which is used as a raw material to synthesize polyurethanes, and it is difficult to simultaneously ensure good thermal-mechanical properties and weather resistance due to insufficient rigidity of the main chain. However, PCD based on ring-opening polymerization of cyclohexene carbonate (CHC), endowing with polyurethanes good mechanical properties, weather ability and biological stability because of the rigid structure of six-membered aliphatic rings in the main chain. Therefore, in this paper, the method and principle of preparing new polycarbonate polyols based on ring-opening polymerization of cyclohexene carbonate (CHC) are introduced. And the problems and countermeasures in its development and its application in polyurethane materials are discussed.

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.

Synthesis of Polyethers from Epoxides via Binary Organocatalyst System

2021 ◽  
Author(s):  
Ge-Ge Gu ◽  
Li-Yang Wang ◽  
Rong Zhang ◽  
Tian-Jun Yue ◽  
Bai-Hao Ren ◽  
...  
Keyword(s):  
Ring Opening ◽  
High Efficiency ◽  
Main Chain ◽  
Ring Opening Polymerization ◽  
Metal Free ◽  
Molecular Weights ◽  
Chain Sequence ◽  
Catalyst Systems

The development of “metal-free” catalyst systems with high efficiency for the ring-opening polymerization (ROP) of epoxides, providing polyethers with controlled molecular weights and dispersity as well as desired main-chain sequence...

scholarly journals Amphiphilic diblock copolymer of hydrophilic-functionalized lactone and lactide via switchable organocatalytic polymerization

RSC Advances ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 1905-1908
Author(s):  
Jinmei Bai ◽  
Xiaoying Tang ◽  
Yuan Zhang ◽  
Jingjing Lin ◽  
Minfeng Li
Keyword(s):  
Particle Size ◽  
Diblock Copolymer ◽  
Ring Opening ◽  
Diblock Copolymers ◽  
Main Chain ◽  
Ring Opening Polymerization ◽  
Acid Base ◽  
One Pot ◽  
Amphiphilic Diblock Copolymers ◽  
Organocatalytic Polymerization

Main-chain degradable amphiphilic diblock copolymers prepared by one-pot ring-opening polymerization via actively manipulating catalytic states of an acid–base catalytic system were capable of forming stable micelle with optimal particle size.

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