Polymorphic Behavior of Syndiotactic Polystyrene-Based Graft Copolymers with Polystyrene and Polyisoprene Side Chains

2001 ◽  
Vol 34 (5) ◽  
pp. 1267-1273 ◽  
Author(s):  
Kazunobu Senoo ◽  
Kiyoshi Endo ◽  
Masatoshi Tosaka ◽  
Syozo Murakami ◽  
Shinzo Kohjiya
Keyword(s):  
Graft Copolymers ◽  
Syndiotactic Polystyrene ◽  
Side Chains ◽  
Polymorphic Behavior

Synthesis and characterization of amphiphilic graft copolymers with hydrophobic poly(α-methylstyrene) backbone and hydrophilic poly(n-vinylpyrrolidone) side chains

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Fatima Zohra Sebba ◽  
Seghier Ould Kada ◽  
Mohamed Benaicha ◽  
Nerjesse Nemiche
Keyword(s):  
Graft Copolymer ◽  
Graft Copolymers ◽  
Radical Copolymerization ◽  
Side Chains ◽  
Free Radical Copolymerization ◽  
Good Efficiency ◽  
Molecular Weights ◽  
Grafting Reaction ◽  
Viscosity Variation ◽  
End Capping

AbstractIn this study, 2-oxopropylmethacrylate-terminated poly(N-vinyl-2- pyrrolidone) is produced by cationic polymerization using HClO4 as an initiator. Termination (end capping) step is accomplished using 2- hydroxypropylmethacrylate (2HPMA) and the polymer product has different chain lengths of molecular weight averages ranging from 672 to 3049 g/mol. The study also synthesised amphipathic graft copolymers having hydrophobic poly(α- methylstyrene) as a backbone chain and hydrophilic poly(N-vinyl-2-pyrrolidone) (PVP) as side chains of various lengths. The copolymer synthesis was accomplished by free radical copolymerization of ω-oxopropylmethacrylate PVP in the presence of α-methyl styrene initiated with benzoyl peroxide. Measurements of the dynamic viscosity of the polymer solution (20% weight of macromonomers in ethanol) show that the viscosity is proportional to the average molecular weights M̅n . However, a reverse behaviour of the viscosity variation with regard to M̅n is observed for graft copolymer samples. The viscosity variation with respect to the graft copolymer mass must be due to steric effects, which are strongly pronounced in grafted copolymer chains. Appearance of the number of side chains attached to poly(α-methylstyrene) backbone reveals that the grafting reaction has occurred with good efficiency.

Preparation of cellulose graft copolymers having polypeptide side chains and their blood compatibility

1986 ◽  
Vol 31 (7) ◽  
pp. 2303-2314 ◽  
Author(s):  
Takeaki Miyamoto ◽  
Shin-Ichi Takahashi ◽  
Sin-Ichi Tsuji ◽  
Hiraku Ito ◽  
Hiroshi Inagaki ◽  
...  
Keyword(s):  
Blood Compatibility ◽  
Graft Copolymers ◽  
Side Chains

Thermoresponsive behavior of graft copolymers based on poly(N,N-dimethylacrylamide-co-diacetoneacrylamide) side chains

2018 ◽  
Vol 136 (6) ◽  
pp. 47051 ◽  
Author(s):  
Yongjun Guo ◽  
Rutong Song ◽  
Rusen Feng ◽  
Gang Dai ◽  
Yan Liang ◽  
...  
Keyword(s):  
Graft Copolymers ◽  
Side Chains

Crystallization and melting of poly(glycerol adipate)-based graft copolymers with single and double crystallizable side chains

2013 ◽  
Vol 51 (21) ◽  
pp. 1581-1591 ◽  
Author(s):  
Dirk Pfefferkorn ◽  
Martin Pulst ◽  
Toufik Naolou ◽  
Karsten Busse ◽  
Jens Balko ◽  
...  
Keyword(s):  
Graft Copolymers ◽  
Side Chains

Efficient Synthesis of Novel Polyethylene Graft Copolymers Containing Polyfluorosiloxane Side Chains

2019 ◽  
Vol 58 (39) ◽  
pp. 18468-18473 ◽  
Author(s):  
Baozheng Tian ◽  
Xianwei Zhang ◽  
Yuquan Cai ◽  
Hong Fan ◽  
Bo-Geng Li
Keyword(s):  
Graft Copolymers ◽  
Side Chains ◽  
Efficient Synthesis
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