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Abstract
Several poly(1,4-butylene sebacate) (SBT) with low molar mass were synthesized, and their number-average molar masses were determined by vapor phase osmometer (VPO). Thermogravimetric analysis (TGA) indicated that they display a good thermal stability. The measurement of solution viscosity of poly(ethylene terephthalate) (PET) certified that the addition of SBT leads to an only small decrease in molar mass of PET in the case of higher molar mass SBT. The compatibility of PET with SBT was studied by scanning electron microscope (SEM); higher molar mass SBT shows a larger tendency towards phase separation. The influence on crystallization of PET was investigated using differential scanning calorimetry (DSC). It was revealed that SBT significantly accelerates the crystallization rate of PET at low temperature and also enhances the crystallization rate of PET at high temperature.
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