THEORETICAL ANALYSIS ON DYNAMIC MECHANICAL TEMPERATURE SPECTRA OF POLYMERS AND ITS APPLICATIONS IV. DETERMINATION OF TWO ACTIVATION ENERGIES AND STRESS RELAXATION MODULUS FOR TWO-PHASE POLYMERS
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THEORETICAL ANALYSIS ON DYNAMIC MECHANICAL TEMPERATURE SPECTRA OF POLYMERS AND ITS APPLICATIONS IV. DETERMINATION OF TWO ACTIVATION ENERGIES AND STRESS RELAXATION MODULUS FOR TWO-PHASE POLYMERS
Acta Polymerica SinicaIssue 1, Pages: 47-52(1993)
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Published:20 February 1993,
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HUANG Jian-hua, SUN Tong. THEORETICAL ANALYSIS ON DYNAMIC MECHANICAL TEMPERATURE SPECTRA OF POLYMERS AND ITS APPLICATIONS IV. DETERMINATION OF TWO ACTIVATION ENERGIES AND STRESS RELAXATION MODULUS FOR TWO-PHASE POLYMERS. [J]. Acta Polymerica Sinica (1):47-52(1993)
DOI:
HUANG Jian-hua, SUN Tong. THEORETICAL ANALYSIS ON DYNAMIC MECHANICAL TEMPERATURE SPECTRA OF POLYMERS AND ITS APPLICATIONS IV. DETERMINATION OF TWO ACTIVATION ENERGIES AND STRESS RELAXATION MODULUS FOR TWO-PHASE POLYMERS. [J]. Acta Polymerica Sinica (1):47-52(1993)DOI:
THEORETICAL ANALYSIS ON DYNAMIC MECHANICAL TEMPERATURE SPECTRA OF POLYMERS AND ITS APPLICATIONS IV. DETERMINATION OF TWO ACTIVATION ENERGIES AND STRESS RELAXATION MODULUS FOR TWO-PHASE POLYMERS
The analysis method previously proposed has been developed to determine two activation energies and stress relaxation modulus for two-phase polymers by using a parallel model of two thermorheologically simple materials as the viscoelastic model of two-phase polymers. By this method the activation energies of relaxation processes around 150℃ and 70℃ were found to be 71.9 and 117.5 kcal/mol respectively for PET/70 PHB copolymer. The latter value agrees with that reported in literature for PET/60 PHB copolymer for the same relaxation pro-cess. Additionally
the ten-second relaxation m duli at various temperatures for PET/70PHB have been calculated
the result is consistent wih that measured by experiment.