Influence of chain microstructure on thermodegradative behavior of furfuryl methacrylate-N-vinylpyrrolidone random copolymers by thermogravimetry
- Univ. de la Habana, Havana (Cuba). Centro de Biomateriales
- Plastmassi, Moscow (Russian Federation)
- CSIC, Madrid (Spain). Inst. de Ciencia y Tecnologia de Polimeros
The thermal behavior of random copolymers of furfuryl methacrylate (F) and N-vinyl-pyrrolidone (P) was studied by means of dynamic thermogravimetric analysis (TGA) in the range 100--600 C. The dynamic experiments show that these copolymers exhibit two degradation steps in the intervals 260--320 C and 350--520 C, respectively. The normalized weight loss in the low temperature interval increases as the mole fraction of F in the copolymer m[sub F] increases, whereas an inverted trend in the high temperature interval is observed. The apparent activation energy E[sub a] of the first degradation step for copolymers prepared with different composition, was obtained according to the treatment suggested by Broido. A plot of the values of E[sub a] versus the F dead molar fraction in the copolymer chains m[sub FF] gave a straight line that indicates that there is a direct relationship between the thermogravimetric behavior of these systems and their corresponding microstructure, that is, the distribution of comonomeric units along the copolymers chains. The first decomposition step was also studied by isothermal TGA and a good linearity for the variation of the weight loss percentage [Delta]W versus m[sub F] at least during the first 30 min of treatment was obtained.
- OSTI ID:
- 5605817
- Journal Information:
- Journal of Applied Polymer Science; (United States), Vol. 50:12; ISSN 0021-8995
- Country of Publication:
- United States
- Language:
- English
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COPOLYMERS
MICROSTRUCTURE
THERMODYNAMIC PROPERTIES
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
THERMAL GRAVIMETRIC ANALYSIS
CHEMICAL ANALYSIS
GRAVIMETRIC ANALYSIS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
TEMPERATURE RANGE
THERMAL ANALYSIS
360602* - Other Materials- Structure & Phase Studies
360606 - Other Materials- Physical Properties- (1992-)