Physical aging in poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends. Part I. Enthalpy relaxation

T. Ho, Jovan Mijovic, T. K. Kwei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, a series of blends of poly(methyl methacrylate) (PMMA) and poly(styrene-co-acrylonitrile) (SAN) were prepared, aged and their enthalpy relaxation evaluated. The overall objective was to monitor and analyze physical aging and enthalpy, volume and stress relaxation measurements. The following general findings were observed; 1. the higher the aging temperature, the faster the relaxation process; 2. under similar aging conditions, SAN-rich blends relax more slowly than PMMA-rich blends at Tg-20°C and Tg-35°C; 3. relaxation rate is insensitive to composition at Tg-50°C; 4. the effect of blending on relaxation is related to the aging temperature in a complex manner; and 5. the maximum possible error in the normalized deviation in enthalpy is ±4%, with the actual error being much smaller.

Original languageEnglish (US)
Title of host publicationAnnual Technical Conference - Society of Plastics Engineers
PublisherPubl by Soc of Plastics Engineers
Pages693-695
Number of pages3
StatePublished - 1989
EventANTEC 89 - 47th Annual Technical Conference of SPE - New York, NY, USA
Duration: May 1 1989May 4 1989

Other

OtherANTEC 89 - 47th Annual Technical Conference of SPE
CityNew York, NY, USA
Period5/1/895/4/89

Fingerprint

Polymethyl methacrylates
Styrene
Enthalpy
Aging of materials
Relaxation processes
Stress relaxation
Temperature
Chemical analysis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ho, T., Mijovic, J., & Kwei, T. K. (1989). Physical aging in poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends. Part I. Enthalpy relaxation. In Annual Technical Conference - Society of Plastics Engineers (pp. 693-695). Publ by Soc of Plastics Engineers.

Physical aging in poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends. Part I. Enthalpy relaxation. / Ho, T.; Mijovic, Jovan; Kwei, T. K.

Annual Technical Conference - Society of Plastics Engineers. Publ by Soc of Plastics Engineers, 1989. p. 693-695.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ho, T, Mijovic, J & Kwei, TK 1989, Physical aging in poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends. Part I. Enthalpy relaxation. in Annual Technical Conference - Society of Plastics Engineers. Publ by Soc of Plastics Engineers, pp. 693-695, ANTEC 89 - 47th Annual Technical Conference of SPE, New York, NY, USA, 5/1/89.
Ho T, Mijovic J, Kwei TK. Physical aging in poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends. Part I. Enthalpy relaxation. In Annual Technical Conference - Society of Plastics Engineers. Publ by Soc of Plastics Engineers. 1989. p. 693-695
Ho, T. ; Mijovic, Jovan ; Kwei, T. K. / Physical aging in poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends. Part I. Enthalpy relaxation. Annual Technical Conference - Society of Plastics Engineers. Publ by Soc of Plastics Engineers, 1989. pp. 693-695
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