The Effect of Microwave Irradiation on the Crystallization Behavior of PET/PEN Blends |
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| Authors: | GuiJuan Li Xiang Yu FanJing Meng KunYan Wang XiaoDuo Xu |
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| Institution: | 1. School of Chemical Engineering, Changchun University of Technology , Chang Chun, People's Republic of China lgjob@tom.com;3. School of Chemical Engineering, Changchun University of Technology , Chang Chun, People's Republic of China;4. School of Chemical Engineering, Changchun University of Technology , Chang Chun, People's Republic of China;5. State Key Laboratory for Modification of Chemical Fiber and Polymer Materials , Donghua University , Shanghai, People's Republic of China |
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| Abstract: | The crystallization behavior of poly(ethylene terephthalate) (PET)/poly(ethylene‐ 2,6‐naphthalate) (PEN) blends before and after microwave irradiation for different time intervals has been investigated by means of wide angle X‐ray diffraction (WAXD) and differential scanning calorimetry (DSC) techniques. It was found that microwave irradiation could greatly affect the crystallization behavior of PET/PEN blends and significantly enhance their degree of crystallinity. For the PET/PEN (90/10) blends, the degree of crystallinity increased from 15 to 45%; for the PET/PEN (60/40) blends, the degree of crystallinity significantly increased, from 1 to 36%. However, with increasing irradiation time, the degree of crystallinity didn't continually increase. It reached a maximum at certain time point. The cold crystallization enthalpy △Hcc gradually decreased as microwave irradiation time increased and the melting enthalpy △Hm vis‐à‐vis the long time interval of such irradiation was decreased. In addition, the mechanism for microwave irradiation affecting the crystallization behavior of polymers is discussed. |
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| Keywords: | microwave irradiation PET/PEN blends crystallization behavior heating effect |
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