Author: F. Candau
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
Synthesis and Characterization of Poly(oxyethylene) Graft Copolymers on Polystyrene
Author: F. Candau
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
Synthesis and Characterization of Poly(2,2,2-trifluoroethoxyphosphazene)polystyrene Graft Copolymers
Author: Pamela Bires Hernandez
Publisher:
ISBN:
Category : Graft copolymers
Languages : en
Pages : 342
Book Description
Publisher:
ISBN:
Category : Graft copolymers
Languages : en
Pages : 342
Book Description
Synthesis and Characterization of Graft Copolymers Poly(isoprene-g-styrene) of High Molecular Weight by a Combination of Anionic Polymerization and Emulsion Polymerization
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
In this study, high molecular weight "comb-shaped" graft copolymers, poly(isoprene-g-styrene), with polyisoprene as the backbone and polystyrene as side chains, were synthesized via free radical emulsion polymerization by copolymerization of isoprene with a polystyrene macromonomer synthesized using anionic polymerization. A small amount of toluene was used in order to successfully disperse the macromonomer. Both a redox and thermal initiation system were used in the emulsion polymerization, and the latex particle size and distribution were investigated by dynamic light scattering. The structural characteristics of the macromonomer and comb graft copolymers were investigated through use of size exclusion chromatography, spectroscopy, microscopy, thermal analysis, and rheology. While the macromonomer was successfully copolymerized to obtain the desired multigraft copolymers, small amounts of unreacted macromonomer remained in the products, reflecting its reduced reactivity due to steric effects. Nevertheless, the multigraft copolymers obtained were very high in molecular weight (5-12 × 105 g/mol) and up to 10 branches per chain, on average, could be incorporated. A material incorporating 29 wt% polystyrene exhibits a disordered microphase separated morphology and elastomeric properties. As a result, these materials show promise as new, highly tunable, and potentially low cost thermoplastic elastomers.
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
In this study, high molecular weight "comb-shaped" graft copolymers, poly(isoprene-g-styrene), with polyisoprene as the backbone and polystyrene as side chains, were synthesized via free radical emulsion polymerization by copolymerization of isoprene with a polystyrene macromonomer synthesized using anionic polymerization. A small amount of toluene was used in order to successfully disperse the macromonomer. Both a redox and thermal initiation system were used in the emulsion polymerization, and the latex particle size and distribution were investigated by dynamic light scattering. The structural characteristics of the macromonomer and comb graft copolymers were investigated through use of size exclusion chromatography, spectroscopy, microscopy, thermal analysis, and rheology. While the macromonomer was successfully copolymerized to obtain the desired multigraft copolymers, small amounts of unreacted macromonomer remained in the products, reflecting its reduced reactivity due to steric effects. Nevertheless, the multigraft copolymers obtained were very high in molecular weight (5-12 × 105 g/mol) and up to 10 branches per chain, on average, could be incorporated. A material incorporating 29 wt% polystyrene exhibits a disordered microphase separated morphology and elastomeric properties. As a result, these materials show promise as new, highly tunable, and potentially low cost thermoplastic elastomers.
The Synthesis and Characterization of Polystyrene Liquid Crystalline Siloxane Block Copolymers
Author: Aaron J. Moment
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
Book Description
Synthesis and Characterization of Polystyrene-polysiloxane Diblock Copolymers
Author: Craig Everett Selby
Publisher:
ISBN:
Category :
Languages : en
Pages : 196
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 196
Book Description
הגדה של פסח עם פרוש עזר מיהודה
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Synthesis and characterization of some polyepichlorohydrin graft copolymers
Author: M. A. Majid
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 388
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 388
Book Description
Synthesis and Characterization of Polystyrene-poly(arylethersulfone)-polystyrene ABA Triblock Copolymers
Author: Lei Zeng
Publisher:
ISBN:
Category : Block copolymers
Languages : en
Pages : 182
Book Description
Publisher:
ISBN:
Category : Block copolymers
Languages : en
Pages : 182
Book Description
Synthesis and Characterization of Polystyrene-Polysiloxane Side-Chain Liquid Crystalline Diblock Copolymers
Author: Aaron J. Moment
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 1
Book Description
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 1
Book Description