Citation: Jun-wu Zhang, Fei Liu, Jing-gang Wang, Hai-ning Na, Jin Zhu. Synthesis of Poly(butylene terephthalate)-Poly(tetramethylene glycol) Copolymers Using Terephthalic Acid as Starting Material: A Comparation between Two Synthetic Strategies[J]. Chinese Journal of Polymer Science, ;2015, 33(9): 1283-1293. doi: 10.1007/s10118-015-1673-4 shu

Synthesis of Poly(butylene terephthalate)-Poly(tetramethylene glycol) Copolymers Using Terephthalic Acid as Starting Material: A Comparation between Two Synthetic Strategies

1.
Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Received Date: 29 January 2015
Revised Date: 8 March 2015

Fund Project: This work was financially supported by the Key Research Program of the Chinese Academy of Sciences (No. KGZD-EW-606-16), Ningbo Key Lab of Polymer Materials (No. 2010A22001) and Ningbo Natural Science Foundation (Nos. 2013A610025, 2013A610023 and 2014A610135).

Poly(butylene terephthalate)-poly(tetramethylene glycol) (PBT-PTMG) copolymer is prepared with terephthalic acid (PTA) rather than its dimethyl ester (DMT) as starting material by a two-step melt polycondensation. This process includes the synthesis of PBT prepolymer from PTA with 1,4-butanediol (BDO) in the first step, followed by the synthesis of PBT-PTMG copolymer from PBT prepolymer with PTMG in the second step. The molecular weight, composition as well as thermal and mechanical properties of the products from the two-step melt polycondensation are compared with the properties of the PBT-PTMG from the traditional one-step melt polycondensation. When the PTMG content is low, there is only slight difference in molecular weight, composition, thermal and mechanical properties among PBT-PTMG copolymers obtained from these two methods. However, when the PTMG content is high, only the two-step strategy is able to give high molecular weight products, and the products have comparable thermal and mechanical properties with those from traditional one-step strategy using DMT as starting material.
- Polycondensation,
- Elastomer,
- Poly(ether-esters)
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