Enthalpy Relaxation and Embrittlement of Poly( l -lactide) during Physical Aging
β Scribed by Pan, Pengju; Zhu, Bo; Inoue, Yoshio
- Book ID
- 121418728
- Publisher
- American Chemical Society
- Year
- 2007
- Tongue
- English
- Weight
- 228 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0024-9297
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## Abstract Enthalpy relaxation due to physical aging of hydroxylβterminated poly(ether sulfone)s (PES) with various molecular weights was studied by DSC at three aging temperatures between __T__~g~ β 45Β°C and __T__~g~ β 10Β°C. The experimental results revealed that both the average enthalpy relaxat
The physical aging of three amorphous polyesters, polyethylene terephthalate, polyethylene napthalate, and polycyclohexane dimethanol terephthalate, was characterized by enthalpy relaxation via the Tool-Narayanaswamy methodology. Subtle differences in the activation energy, relaxation times, and dis