| PA1012 is a new kind of excellent long-chain nylon. Since in many application fields for long-chain nylon must have good toughness. In order to expand the application fields of nylon 1012, it must be toughened. Polymer blend is a relatively economical method, while nylon blends with elastomer is the main method.In this paper, ACR-g-GMA, as a toughening agent, PA1012/ACR-g-GMA was prepared with different content of ACR-g-GMA by extrusion granulation.Scanning electron microscope (SEM), X-ray diffractometer (XRD), melt flow rate (MFR) and mechanical tests were used to study the related character of PA 1012 which were toughened by core-shell structured polymer (ACR-g-GMA). The results showed that: Notch impact strength of the blend first increased then decreased with the increasing of ACR-g-GMA content. When the ACR-g-GMA content was 9%, notch impact strength reached the maximum value of 81kJ/m2, being about 3.8 times as high as that of pure PA1012. The tensile strength value was 41.12 MPa,decreased about 20% The viscosity decreased to 2.3 g/lOmin, SEM photographs showed that core-shell particles can be dispersed evenly in the blend. The research of X-ray diffractometer indicated that the crystal structure changing from a-phase structure to β-phase structure with the increasing of ACR-g-GMA content.The isothermal and non-isothermal crystallization kinetics of PA1012/ACR-g-G MA composite system was studied by differential scanning calorimerty (DSC). The isothermal crystallization kinetics parameters were obtained using Avrami quation an d the non-isothermal crystallization kinetics parameters were obtained using Jeziorny method and Mo method to analyze. The results show that the addition of ACR-g-GMA can play a role of heterogeneous nucleation. The activation energies were det ermined to be 224.49kJ/mol and 246.21kJ/mol for isothermal and nonisothermal crys tallization, respectively. The comparison energy of the activation, nonisothermal wer e easier than isothermal crystallization. |
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