Glass-transition temperature of poly(vinylidene fluoride)-poly(methyl acrylate) blends: Influence of aging and chain structure

2000 ◽  
Vol 79 (9) ◽  
pp. 1541-1548 ◽  
Author(s):  
Pralay Maiti ◽  
Asok K. Dikshit ◽  
Arun K. Nandi
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Methyl Acrylate ◽  
Vinylidene Fluoride ◽  
Chain Structure ◽  
Poly Vinylidene Fluoride

Thermoplastic Modification to Konjac Glucomannan with Methyl Acrylate

2009 ◽  
Vol 620-622 ◽  
pp. 133-136 ◽  
Author(s):  
Xue Gang Luo ◽  
Feng Liu ◽  
Zheng Guang Zhang ◽  
Xiao Yan Lin
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Ammonium Persulfate ◽  
Konjac Glucomannan ◽  
Structure And Properties ◽  
Optimal Conditions ◽  
Grafting Efficiency

A novel thermoplastic konjac glucomannan(TKGM) was synthesized with KGM and methyl acrylate(MA) initiated by ammonium persulfate. The percentage grafting (PG) and the grafting efficiency (GE) was affected by concentration of initiator and monomer, temperature, and time. The results indicated that the percentage grafting (PG) and the grafting efficiency (GE) can attach 70% and 90% at optimal conditions, respectively. The structure and properties of TKGM were characterized by FTIR and DSC. FTIR results demonstrated that graft copolymerization was occurred between MA and KGM. The results of DSC indicated that a new glass transition temperature (Tg) of TKGM at 16.4°C was appeared compared with KGM with no glass transition temperature. It suggested that product of TKGM can be made through thermoplastic process.

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