Self-condensing reversible complexation-mediated copolymerization for highly branched polymers with in situ formed inimers

2017 ◽  
Vol 8 (44) ◽  
pp. 6844-6852 ◽  
Author(s):  
Hongjun Yang ◽  
Zhongrui Wang ◽  
Lei Cao ◽  
Wenyan Huang ◽  
Qiming Jiang ◽  
...  
Keyword(s):  
Branched Polymers ◽  
Vinyl Polymerization

In this work, reversible complexation-mediated polymerization (RCMP) was modified to suit self-condensing vinyl polymerization (SCVP) aimed at the synthesis of highly branched polymers.

TiCp2Cl-Catalyzed Living Radical and Ring Opening Polymerizations Initiated from Epoxides and Aldehydes in the Synthesis of Linear, Graft and Branched Polymers

2004 ◽  
Vol 856 ◽  
Author(s):  
Alexandru D. Asandei ◽  
Isaac W. Moran ◽  
Gobinda Saha ◽  
Yanhui Chen
Keyword(s):  
Electron Transfer ◽  
Ring Opening ◽  
Glycidyl Methacrylate ◽  
Ring Opening Polymerization ◽  
Branched Polymers ◽  
Single Electron Transfer ◽  
Radical Ring ◽  
Polymer Architectures ◽  
Complex Polymer

ABSTRACTTi(III)Cp2Cl-catalyzed radical ring opening (RRO) of epoxides or single electron transfer (SET) reduction of aldehydes generates Ti alkoxides and carbon centered radicals which add to styrene, initiating a radical polymerization. This polymerization is mediate in a living fashion by the reversible termination of growing chains with the TiCp2Cl metalloradical. In addition, polymers or monomers containing pendant epoxide groups (glycidyl methacrylate) can be used as substrates for radical grafting or branching reactions by self condensing vinyl polymerization. In addition, Ti alkoxides generated in situ by both epoxide RRO and aldehyde SET initiate the living ring opening polymerization of ε-caprolactone. Thus, new initiators and catalysts are introduced for the synthesis of complex polymer architectures.

In situ xanthate deprotection to generate thiol chain transfer agents for conventional free radical linear and branched vinyl polymerization

2017 ◽  
Vol 55 (24) ◽  
pp. 3963-3967 ◽  
Author(s):  
Sean Flynn ◽  
Simon D. Dale ◽  
Andrew B. Dwyer ◽  
Pierre Chambon ◽  
Steve P. Rannard
Keyword(s):  
Free Radical ◽  
Chain Transfer ◽  
Vinyl Polymerization ◽  
Transfer Agents

Preparation and characterization of novel multi-branched polymers in situ cured from benzoxazine/epoxy resin/primary amines blends

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 15271-15278 ◽  
Author(s):  
Hongyuan Wang ◽  
Po Yang ◽  
Rongqi Zhu ◽  
Yi Gu
Keyword(s):  
Epoxy Resin ◽  
High Performance ◽  
Branched Polymers ◽  
Primary Amines ◽  
Branched Copolymers

Novel high-performance multi-branched copolymers were prepared in situ from benzoxazine, epoxy resin and primary amines through controlling the curing reactions.

Self-Condensing Iodine Transfer Copolymerization for Highly Branched Polymers Using an in Situ Formed Chain Transfer Monomer

2019 ◽  
Vol 52 (4) ◽  
pp. 1731-1738 ◽  
Author(s):  
Hongjun Yang ◽  
He Chang ◽  
Yiye Song ◽  
Zhongrui Wang ◽  
Wenyan Huang ◽  
...  
Keyword(s):  
Chain Transfer ◽  
Branched Polymers ◽  
Iodine Transfer ◽  
Chain Transfer Monomer

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

Sign in / Sign up

Export Citation Format

Share Document