材料研究学报  2013, Vol. 27 Issue (2): 149-156

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不同1, 4-丁二醇含量聚醚酯PBT/PTMG的制备和性能*

郑马宁 张群朝 蒋涛

(湖北大学材料科学与工程学院 武汉 430062)

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)

郑马宁 张群朝 蒋涛. 不同1, 4-丁二醇含量聚醚酯PBT/PTMG的制备和性能*[J]. 材料研究学报, 2013, 27(2): 149-156.
. Preparation and Properties of PBT/PTMG Block Poly
(ether ester) with Different Molar Ratio of BDO[J]. Chinese Journal of Materials Research, 2013, 27(2): 149-156.

摘要 参考文献 相关文章 Metrics 全文: PDF(2466 KB)   摘要: 采用熔融聚合法制备一系列聚对苯二甲酸丁二醇酯(PBT)/聚四亚甲基醚二醇(PTMG)聚醚酯热塑性弹性体, 用NMR, FTIR, SEM, DSC, DMA, TGA及力学性能测试等方法表征了材料的结构与性能特征。在固定软段不变的条件下, 研究了1, 4-丁二醇(BDO)与对苯二甲酸二甲酯(DMT)的摩尔比变化对材料力学性能的影响。结果表明: 随着BDO∶DMT摩尔比的增加, 聚酯硬段PBT的形成更完善, 微相分离程度的提高促使层状有规结晶体及相界面形貌更明显、结晶度、储能模量及tanδ峰值的升高和力学性能的提高; 当BDO∶DMT摩尔比超过1.6∶1时残存低分子BDO在相界面区和PBT层状结晶体周围的结晶使相界面区易发生脱粘或滑移, 严重阻碍微相分离过程, 使结晶度、储能模量及tanδ峰值降低, 进而使力学性能下降。 关键词 ： 有机高分子材料,  聚醚酯弹性体,  PBT/PTMG聚醚酯,  1,  4-丁二醇,  力学性能     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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