Summary
Characters of amorphous phase in semicrystalline poly(ethy1ene terephthalate) (PET) were investigated systematically via dynamic mechanical thermal analysis (DMTA) in this paper. It was found that the storage modulus (E') and the glass transition temperature (Tg) of semicrystalline PET changed with the degree of crystallinity (Xc). Tg showed good linearity with Xc. However, neither reduction of E' in the Tg region (ΔlgE') nor loss tangent (tanδ) at the Tg presented linearity with Xc, which suggests that the two-phase model was not suitable for semicrystalline PET. It was also confirmed that the physical aging reduced the chain segmental mobility, producing higher Tg.
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Received: 22 July 2OO2/Revised version: 19 September 2002/ Accepted: 23 September 2002
Correspondence to Qingrong Fan e-mail: qrfan@pplas.icas.ac.cn, Tel.: +86-10-62563065, Fax: +86-10-62559373
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Dong, W., Zhao, J., Li, C. et al. Study of the amorphous phase in semicrystalline poly(ethy1ene terephthalate) via dynamic mechanical thermal analysis . Polymer Bulletin 49, 197–203 (2002). https://doi.org/10.1007/s00289-002-0091-2
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DOI: https://doi.org/10.1007/s00289-002-0091-2