Anionic polymerization of acrylic monomers. 8. Synthesis and characterization of (meth)acrylic end-functionalized polymers: macromonomers and telechelics

1992 ◽  
Vol 25 (21) ◽  
pp. 5578-5584 ◽  
Author(s):  
Sunil K. Varshney ◽  
Philippe Bayard ◽  
Christian Jacobs ◽  
Robert Jerome ◽  
Roger Fayt ◽  
...  
Keyword(s):  
Anionic Polymerization ◽  
Functionalized Polymers ◽  
Synthesis And Characterization ◽  
Acrylic Monomers

Side Chain Liquid Crystalline Block Copolymers With Chiral Smectic C* Mesogens

1996 ◽  
Vol 425 ◽  
Author(s):  
Wen Yue Zheng ◽  
Paula T. Hammond
Keyword(s):  
Glass Transition ◽  
Block Copolymers ◽  
Anionic Polymerization ◽  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Side Chain ◽  
Synthesis And Characterization ◽  
Glass Transition Temperatures ◽  
Smectic C

AbstractA new series of side chain liquid crystalline-amorphous diblock copolymers has been successfully synthesized using chiral mesogens. Anionic polymerization techniques have been used to make these monodisperse diblock materials. Preliminary studies suggest that these microphase segregated diblock copolymers exhibit a smectic C* phase. This mesophase exists between and above the glass transition temperatures of the two polymer blocks. Synthesis and characterization of these novel materials are discussed.

SYNTHESIS AND CHARACTERIZATION OF FARNESENE-BASED POLYMERS

2017 ◽  
Vol 90 (2) ◽  
pp. 308-324 ◽  
Author(s):  
Taejun Yoo ◽  
Steven K. Henning
Keyword(s):  
Molecular Weight ◽  
Anionic Polymerization ◽  
Molar Mass ◽  
Functional Materials ◽  
Synthesis And Characterization ◽  
Low Molecular Weight ◽  
Structure Property ◽  
Structure Property Relationships ◽  
By Products

ABSTRACT A bio-based route to the production of trans-β-farnesene has recently been commercialized. Trans-β-farnesene is capable of being polymerized by both anionic and cationic pathways, creating low molecular weight polymers with structure–property relationships unique within the diene class of monomers. Trans-β-farnesene is produced through fermentation of sugar feedstocks. The pathway offers an alternative to petroleum-based feedstocks derived as by-products of naphtha or ethane cracking. Anionic polymerization of the monomer produces a highly branched “bottlebrush” structure, with rheological properties that are markedly different than those of linear diene polymers. Specifically, a lack of entanglements is observed even at relatively high molar masses. For hydroxyl-terminated oligomers, Tg as a function of molar mass follows a trend opposite non-functional materials. The synthesis and characterization of trans-β-farnesene–based polymers will be presented, including anionically prepared low molecular weight diols and monols.

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