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| Preparation and Properties of PBT/PTMG Block Poly(ether ester) with Different Molar Ratio of BDO |
| ZHENG Xuan MA Ning ZHANG Qunzhao JIANG Tao** |
| (Facoulty of Materials and Engineering, Hubei University , Wuhan 430062) |
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Cite this article:
ZHENG Xuan, MA Ning, ZHANG Qunzhao,JIANG Tao,. Preparation and Properties of PBT/PTMG Block Poly(ether ester) with Different Molar Ratio of BDO. Chinese Journal of Materials Research, 2013, 27(2): 149-156.
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Abstract A series of poly(ether ester) thermoplastic elastomer, based on poly (tetramethylene ether) glycol (PTMG) and poly(butylene terephthalate)(PBT) have been prepared by molten polycondensation. Structure and property characteristics of materials were characterized by means of NMR, FTIR, SEM, DSC, DMA, TGA and mechanical testing. The influence of different molar ratios of 1, 4-butanediol(BDO)∶Dimethyl terephthalate(DMT)(2.5∶1~1∶1) with constant proportion?of?soft block on the poly(ether ester)’s properties was mainly investigated. It was observed that: the crystallization of the polyester hard block PBT are reinforced with the increase of BDO∶DMT molar ratio, the layered regulatory crystal and interface morphology were promoted by the exaltation of micro-phase separation. The crystallinity , storage modulus, tanδ as wells as the mechanical properties increase with the increase of BDO∶DMT molar ratio. However when BDO∶DMT were more than 1.6∶1, residual low molecular BDO crystallized between phase interface and PBT layered crystals greatly impeded micro-phase separation, and the phase interface area were easily debonding or slipping, therefore, the crystallinity , storage modulus , tanδand mechanical properties of materials reduced gradually.
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