مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

Asuspension solid-state grafting approach was employed to prepare a functional PP (FPP)-methacryloxyethyltrimethyl ammonium chloride grafted PP (PP-g-(Stco- DMC)). The non-isothermal crystallization kinetics of pure PP and FPP/PP(10/90) blends have been investigated under non-isothermal conditions by differential scanning calorimetry (DSC). The Avrami analysis modified by Mandelkern and a method combined with Avrami and Ozawa equations were employed to describe the non-isothermal crystallization kinetics of samples. Ultimately it was shown that the nucleation in FPP/PP blends facilitated by the electrostatic interactions between the quaternary ammonium cations resulted in high crystallization rates during the crystallization process. However, electrostatic interaction became stronger as the amounts of DMC increased, chain diffusion and mobility of the crystallizable segments diminished, and thus the crystallization process was slowed down when FPP (DGFPP = 13.23%) was added. In addition, the activation energy for the transport of the polymeric segment to the growing crystal surface was also obtained according to the Kissinger method.