Effect of Chain Extender (ADR4370S) on Non-Isothermal Crystallization Kinetics of PBT
Chain extender modification of poly (butylene terephthalate) (PBT) was performed with a multifunctional epoxide chain extender (ADR4370S).The effect of the chain extender was investigated by comparison of the intrinsic viscosities between pure PBT and chain extended PBT.The non-isothermal crystallization behavior of PBT composite was also studied by differetial scanning calorimetry (DSC).The result showed that the intrinsic viscosity of PBT was increased from 1.061 dL/g to 1.464 dL/g with the introduction of ADR470S,suggesting that the epoxide compound was an effective extender for PBT moleculars.It was also cleared that the introduction of ADR4370S improved the crystallization temperature of PBT without changing its nucleation mechanism and crystal growth.Compared with the Jeziorny method,Mo method gave a better description for the non-isothermal crystallization of PBT and 1.25ADR/PBT composite.The activation energies of 1.25ADR/ PBT calculated by Flynn-Wall-Ozawa method was lower than that of pure PBT,revealing that the present of ADR4370S leaded to decrement of the activation energy of PBT crystallization.
poly (butylene terephthalate)ADR4370Schain extensionnon-isothermal crystallization kineticsactivation energy
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万方数据
维普
