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Synthesis and hydrophilicities of Poly(ethylene 2,6-naphthalate)/Poly(ethylene glycol) copolymers

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Abstract

Poly(ethylene 2,6-naphthalate) (PEN)/Poly(ethylene glycol) (PEG) copolymers were synthesized by two step reaction during the melt copolymerization process. The first step was the esterification reaction of dimethyl-2,6-naphthalenedicarboxylate (2,6-NDC) and ethylene glycol (EG). The second step was the condensation polymerization of bishydroxyethylnaphthalate (BHEN) and PEG. The copolymers contained 10 mol% of PEG units with different molecular weights. Structures and thermal properties of the copolymers were studied by using1H-NMR, DSC, TGA, etc. Especially, while the intrinsic viscosities of PEN/PEG copolymers increased with increasing molecular weights of PEG, but the glass transition temperature, the cold crystallization temperature, and the weight loss temperature of the copolymers decreased with increasing molecular weights of PEG. Consequently, the hydrophilicities by means of contact angle measurement and moisture content of the copolymer films were found to be significantly improved with increasing molecular weights of PEG.

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Authors and Affiliations

  1. Department of Textile Engineering, Dankook University, 140-714, Seoul, Korea

    Jun Sik Son & Dong Sun Ji

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  1. Jun Sik Son
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  2. Dong Sun Ji
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Correspondence to Dong Sun Ji.

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Son, J.S., Ji, D.S. Synthesis and hydrophilicities of Poly(ethylene 2,6-naphthalate)/Poly(ethylene glycol) copolymers. Fibers Polym 4, 156–160 (2003). https://doi.org/10.1007/BF02908272

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  • DOI: https://doi.org/10.1007/BF02908272

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