scholarly journals Phosphonium-containing diblock copolymers from living anionic polymerization of 4-diphenylphosphino styrene

2016 ◽  
Vol 52 (5) ◽  
pp. 950-953 ◽  
Author(s):  
Alison R. Schultz ◽  
Gregory B. Fahs ◽  
Chainika Jangu ◽  
Mingtao Chen ◽  
Robert B. Moore ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Anionic Polymerization ◽  
Diblock Copolymers ◽  
Living Anionic Polymerization ◽  
Molecular Weights

Living anionic polymerization of 4-diphenylphosphino styrene (DPPS) achieved well-defined homopolymers, poly(DPPS-b-S) styrenic block copolymers, and poly(I-b-DPPS) diene-based diblock copolymers with predictable molecular weights and narrow polydispersities.

scholarly journals A controlled synthesis method of alkyl methacrylate block copolymers via living anionic polymerization at ambient temperature

RSC Advances ◽  
2019 ◽  
Vol 9 (28) ◽  
pp. 16049-16056 ◽  
Author(s):  
Zheng Li ◽  
Jianding Chen ◽  
Guijin Zou ◽  
Tongyuan Zhang ◽  
Dafu Wei ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ambient Temperature ◽  
Anionic Polymerization ◽  
Diblock Copolymers ◽  
Synthesis Method ◽  
Controlled Synthesis ◽  
Living Anionic Polymerization ◽  
Alkyl Methacrylate ◽  
High Yields

A series of well-defined diblock copolymers containing PMMA, PEMA and PBMA blocks were synthesized with narrow MWDs and high yields via anionic polymerization, while t-BuOK was selected as initiator in THF at 0 °C. .

Anionic polymerization of 1,3-pentadiene in toluene: homopolymer, alternating and block copolymers

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51533-51543 ◽  
Author(s):  
Lei Ren ◽  
Kun Liu ◽  
Qing He ◽  
Encai Ou ◽  
Yanbing Lu ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Anionic Polymerization ◽  
Diblock Copolymers ◽  
Living Anionic Polymerization ◽  
Amphiphilic Diblock Copolymers

Well-defined alternating and amphiphilic diblock copolymers containing poly(1,3-pentadiene) were synthesized in toluene via living anionic polymerization.

Side-Chain LC Block Copolymers with Well Defined Structures Prepared by Living Anionic Polymerization. 2: Effect of the Glass Transition Temperature of Amorphous Segments on the Phase Behaviour and Structure of the LC Segment

1998 ◽  
Vol 10 (1) ◽  
pp. 131-138 ◽  
Author(s):  
Masayuki Yamada ◽  
Tomomichi Itoh ◽  
Akira Hirao ◽  
Sei-Ichi Nakahama ◽  
Junji Watanabe
Keyword(s):  
Glass Transition ◽  
Anionic Polymerization ◽  
Diblock Copolymers ◽  
Domain Size ◽  
Phase Behaviour ◽  
Side Chain ◽  
Isotropic Phase ◽  
Transition Temperatures ◽  
Living Anionic Polymerization ◽  
Methyl Styrene

We have prepared two classes of LC diblock copolymers, OcSt-b-LC and MeStb-LC, by living anionic polymerization. These are composed of the side-chain LC polymer as one segment and two different amorphous polymers, poly(octyl styrene) (OcSt) and poly(α-methyl styrene) (MeSt), as the other segment. OcSt and MeSt segments have glass transition temperatures of −60 °C and 160 °C respectively, which are relatively lower and higher than the transition temperatures of crystal–SA (∼90 °C) and SA–isotropic (∼130 °C) in the LC segment. In OcSt-b-LC the lamellar domain size decreases gradually from that of the crystal phase to that of the isotropic phase, indicating that the global conformation of the backbone changes throughout the SA temperature region. In MeSt-b-LC, in contrast, no change in the lamellar size is observed and the crystallinity of the LC segment is reduced in comparison with that in OcSt-b-LC while the liquid crystal is well formed. Such a distinction between two copolymer systems, arising from an interplay between the LC and amorphous segments, shows that the global conformation of the backbone is significant for understanding the phase behaviour and structure of side-chain LC polymers.

Recent Advances in Thermoplastic Elastomer Synthesis

1991 ◽  
Vol 64 (3) ◽  
pp. 450-468 ◽  
Author(s):  
Roderic P. Quirk ◽  
Jungahn Kim
Keyword(s):  
Block Copolymers ◽  
Anionic Polymerization ◽  
Structural Control ◽  
Thermoplastic Elastomer ◽  
Living Polymerization ◽  
Controlled Synthesis ◽  
Living Anionic Polymerization ◽  
Recent Advances ◽  
Living Polymerizations

Abstract A variety of living polymerization systems are now available for the controlled synthesis of block copolymers. Although living anionic polymerization remains as the method of choice for the most precise structural control, living polymerizations proceeding via other mechanistic types provide extremely useful extensions of this methodology to a wider variety of monomers.

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