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首页> 外文期刊>Journal of Applied Polymer Science >Polypropylene/wasted poly(ethylene terephthalate) fabric composites compatibilized by two different methods: Crystallization and melting behavior, crystallization morphology, and kinetics
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Polypropylene/wasted poly(ethylene terephthalate) fabric composites compatibilized by two different methods: Crystallization and melting behavior, crystallization morphology, and kinetics

机译：通过两种不同的方法使聚丙烯/废聚对苯二甲酸乙二酯织物复合材料相容：结晶和熔融行为，结晶形态和动力学

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摘要

Polypropylene (PP)/wasted poly(ethylene terephthalate) (PET) fabric composites and these composites modified by maleic anhydride grafted polypropylene (PP-g-MA) and reactive monomers were prepared with a twin-screw extruder. The crystallization morphology, nonisothermal crystallization and melting behavior, crystallization kinetics, and isothermal crystallization kinetics were investigated with differential scanning calorimetry. The results indicated that the wasted fabric (WF) had a heterogeneous nucleation effect on PP in the composites, and this increased the crystallization temperature and induced PP to form transcrystallinity. PP-g-MA further increased the crystallization temperature; however, the reactive monomers weakened the heterogeneous nucleation effect of WF. Also, the premelting temperature affected the crystallization and melting behavior of the composites significantly. The Avrami equation and the Mo method provided a fairly satisfactory description of the crystallization kinetics. The crystallization activation energy, nucleation constant, and folding surface free energy of PP were markedly reduced in the PP/waste PET fabric composites and the compatibilized composites.
机译：用双螺杆挤出机制备聚丙烯（PP）/浪费的聚对苯二甲酸乙二酯（PET）织物复合材料以及这些被马来酸酐接枝聚丙烯（PP-g-MA）和反应性单体改性的复合材料。用差示扫描量热法研究了结晶形态，非等温结晶和熔融行为，结晶动力学和等温结晶动力学。结果表明，废织物（WF）对复合材料中的PP具有不均匀的成核作用，从而提高了结晶温度并诱导PP形成了结晶性。 PP-g-MA进一步提高了结晶温度;然而，反应性单体减弱了WF的异质成核作用。而且，预熔融温度显着影响复合材料的结晶和熔融行为。 Avrami方程和Mo方法提供了相当令人满意的结晶动力学描述。在PP /废PET织物复合材料和增容的复合材料中，PP的结晶活化能，成核常数和折叠表面自由能明显降低。

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