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Titolo:
Role of a small amount of comonomer on the physical aging of poly(methyl methacrylate) copolymer investigated by dynamic viscoelasticity
Autore:
Araki, O; Masuda, T;
Indirizzi:
Texas Tech Univ, Dept Chem Engn, Lubbock, TX 79409 USA Texas Tech Univ Lubbock TX USA 79409 ept Chem Engn, Lubbock, TX 79409 USA Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Sakyou Ku, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 Chem Mat, Sakyou Ku, Kyoto 6068501, Japan
Titolo Testata:
POLYMER
fascicolo: 3, volume: 43, anno: 2002,
pagine: 857 - 861
SICI:
0032-3861(200202)43:3<857:ROASAO>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
RELAXATION; POLYCARBONATE; BEHAVIOR; DENSITY;
Keywords:
physical aging; poly(methyl methacrylate) copolymer; viscoelastic properties;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Araki, O Texas Tech Univ, Dept Chem Engn, Lubbock, TX 79409 USA Texas TechUniv Lubbock TX USA 79409 Engn, Lubbock, TX 79409 USA
Citazione:
O. Araki e T. Masuda, "Role of a small amount of comonomer on the physical aging of poly(methyl methacrylate) copolymer investigated by dynamic viscoelasticity", POLYMER, 43(3), 2002, pp. 857-861

Abstract

The physical aging of a poly(methyl methacrylate) (PMMA) copolymer having a small amount of ethyl methacrylate was investigated below its glass transition temperature (T-g) using dynamic viscoelastic measurements. The results were compared with those from homo-PMMAs to investigate how the comonomerin the copolymer affects the physical aging of the glass. Annealing temperatures were classified into two categories by the glass transition temperature of a poly(ethyl methacrylate) (T-gPEMA; ca. 65 degreesC). The relaxation rate of the copolymer into two categories by the glass transition temperature of a poly(ethyl methacrylate) was faster than those of the homo-PMMAs when the samples were aged below T-gPEMA, but the rates were equal when aged at above T-gPEMA. The experimental results are discussed in terms of the segmental motion. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 18:31:47