Design and Synthesis of Mechano-Responsive Color-Changing Thermoplastic Elastomer Based on Poly(n-
Butyl Acrylate)-Spiropyran-Polystyrene Comb-Structured Graft Copolymers

AbstractEthylene-vinyl alcohol (EVOH) copolymers with different vinyl alcohol (VOH) mole % have been grafted by the carboxyl terminated poly(butyl acrylate) (PBA) prepolymers by the grafting-onto method. The carboxyl terminated PBA were synthesised by solution radical polymerization using 4,4 azobis(cyanovaleric acid) (ACVA) as initiator and thioglycolic acid (TGA) as matched chain transfer agent and then converting carboxyl groups into acid chloride terminated prepolymer by reacting with oxalyl chloride. The acid chloride terminated prepolymers were reacted with EVOH copolymer backbone to synthesize graft copolymers. The graft copolymers were characterized by the Size Exclusion Chromatography (SEC), Fourier Transfer Infrared spectroscopy (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. Results from these analyses confirmed the grafting of PBA side chain on to EVOH backbone. Differential Scanning Calorimetery (DSC), Dynamic Mechanical Thermal Analysis (DMTA) and x-ray diffraction studies of graft copolymers showed that the morphology of crystalline EVOH polymers has been disrupted due to grafting of amorphous PBA chains.

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Small-angle X-ray scattering and linear melt rheologyof poly(tert-butyl acrylate-g-styrene) graft copolymers

Polymer ◽

10.1016/j.polymer.2006.01.041 ◽

2006 ◽

Vol 47 (5) ◽

pp. 1487-1495 ◽

Cited By ~ 13

Author(s):

J.L. de la Fuente ◽

M. Fernández-García ◽

M.L. Cerrada ◽

H.W. Spiess ◽

M. Wilhelm

Keyword(s):

Small Angle ◽

Butyl Acrylate ◽

Graft Copolymers ◽

X Ray ◽

Tert Butyl ◽

X Ray Scattering ◽

Ray Scattering

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Synthesis of graft copolymers. III. Polystyrene-g-poly(butyl acrylate)

Journal of Applied Polymer Science ◽

10.1002/app.2227 ◽

2001 ◽

Vol 83 (1) ◽

pp. 19-26

Author(s):

Graciela Morales ◽

Ramiro Guerrero

Keyword(s):

Butyl Acrylate ◽

Graft Copolymers

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Synthesis and Characterization of Reactive Graft Copolymers of Poly(butyl Acrylate) and Cellulose

Polymers and Polymer Composites ◽

10.1177/096739110501300504 ◽

2005 ◽

Vol 13 (5) ◽

pp. 467-478

Author(s):

Ghanshyam S. Chauhan ◽

Baljit Singh ◽

Suresh Kumar ◽

Anupama Chinkara

Keyword(s):

Butyl Acrylate ◽

Metal Ion ◽

Graft Copolymerization ◽

Graft Copolymers ◽

Optimum Conditions ◽

Ion Sorption ◽

Graft Yield ◽

Ft Ir ◽

Structural Aspects

Butyl acrylate was graft copolymerized onto cellulose extracted from pine needles by a simultaneous gamma radiation initiation method. Optimum conditions for the maximum graft yield were established. Polymerization and grafting parameters such as %grafting (Pg), % grafting efficiency (%GE), rates of polymerization (Rp), homopolymerization (Rh) and graft copolymerization (Rg) were also determined. Grafted cellulose was further functionalized to produce poly(acryloyl hydroxylamine) [Cell-g-poly(CONHOH)] so as to generate active (-CONHOH) groups on the cellulose backbone. Graft copolymers were characterized by elemental analysis, by FT-IR and by a swelling study. An attempt was also made to study the sorption of Fe+2 and Cu+2 as model metal ions onto the candidate copolymers, in order to investigate their selectivity in metal ion sorption and to determine the effect on metal ion sorption of the structural aspects of the hydrogels and other functionalized graft copolymers, so as to identify their end-uses.

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