Thermal properties of Poly(trimethylene terephthalate)/Poly(ethylene terephthalate) melt blends |
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| Authors: | Email author" target="_blank">Tae?Won?SonEmail author Kwang?Il?Kim Nam?Hun?Kim Min?Gi?Jeong Young?Hun?Kim |
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| Institution: | (1) School of Textiles, Yeungnam University, 712-749 Gyeongsan, Gyeongbuk, Korea;(2) Research & Development Center, DaeHan Oil Chemical Corporation, 704-330 Taegu, Korea;(3) Textile Research Center, Hyosung Corporation, 431-080 Anyang, Kyonggi, Korea |
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| Abstract: | The thermal behavior, morphology, ester-interchange reaction of Poly(trimethylene terephthalate) (PTT)/Poly(ethylene terephthalate)
(PET) melt blends were investigated over the whole composition range(xPTT/(1-x)PET) using a twinscrew Brabender. The melt
blends were analyzed by differential scanning calorimetry (DSC), nuclear magnetic resonance spectroscopy (13C-NMR), and scanning electron microscopy (SEM). Single glass transition temperature (T
g
) and cold crystallization temperature (T
cc
) were observed in all melt blends. Melt blends were found to be due to the ester-interchange reaction in PTT/PET blend. Also
the randomness of copolymer increases because transesterification between PTT and PET increases with increasing blending time.
This reaction increases homogeneity of the blends and decreases the degree of crystallinity of the melt blends. In PTT-rich
blends, mechanical properties decrease with increase of PET content compared with that of pure PTT. And, in PET-rich blends,
tensile modulus decreases with increase of PTT content, but tensile strength and elongation is similar to that of pure PET. |
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| Keywords: | PTT PET Transesterification Thermal behavior Blend Morphology |
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