Preparation and Properties of PA6/CaCl2 Materials Modified by Surlyn Resin
In this paper,surlyn-modified nylon 6(PA6)/CaCl2 materials were prepared by the twin-screw extrusion,and the effects of surlyn resin modification on the molecular chain structures of the composites were studied by Fourier transform infrared spectroscopy(FTIR)and Raman spectroscopy.The crystallization properties and microstructures of the modified materials were analyzed by X-ray diffraction(XRD),differential scanning calorimetry(DSC)and scanning electron microscopy(SEM).The results show that surlyn resin can weaken the hydrogen bonds between PA6 molecular chains,but the crystallinity of PA6/CaCl2/surlyn composites do not change significantly.The percentage of γ crystal increases with the increasing of surlyn resin content.After adding surlyn resin with a mass fraction of 20%,the crystallinity of PA6/CaCl2/Surlyn composite is almost unchanged,but the percentage of α crystal decreases from 38.43%to 30.52%.After adding surlyn resin with a mass fraction of 15%,the PA6/CaCl2/surlyn composite shows obvious brittle-ductile transition.After adding surlyn resin with a mass fraction of 20%,the tensile strength of the composite is 58.12 MPa,which only decreases by 10.42%compared with pure PA6.And its elongation at break and notch impact strength reach 152.14%and 10.27 kJ/m2,increasing by 135.98%and 66.72%,respectively.
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