Abstract
In this paper, a family of eight N,N′-diphenyl bisamide compounds were synthesized and characterized by fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (NMR) technologies. The influence of different compounds on the formation of β crystalline form in iPP had been investigated by means of wide angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC) and polarized light microscopy (PLM). N,N′-diphenyl succinamide (DPS), N,N′-diphenyl glutaramide (DPG) and N,N′-diphenyl adipamide (DPA) are β-nucleating agents for iPP among these compounds. The results also indicate that DPS and DPA have higher ability to induce the β-form than DPG. The analysis of the cell parameters of three efficient β-nucleating agents shows that they all have approximate periodic length of b-axis of 0.65 nm. And it is also suggested that two-dimensional lattice matching relationships exist between the crystal structures of the β-nucleating agents and that of β-iPP.
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Lu, Q., Dou, Q. Effect of a Novel Family of N,N′-Diphenyl Bisamides on the Formation of β Crystalline Form in Isotactic Polypropylene. Polym J 41, 254–259 (2009). https://doi.org/10.1295/polymj.PJ2008169
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DOI: https://doi.org/10.1295/polymj.PJ2008169
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