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Abstract
The effect of the nucleating agent masterbatch carrier resin on the nonisothermal crystallization of a pipe-grade polypropylene block copolymer was investigated at three different cooling rates using differential scanning calorimetry (DSC). Bis(3,4-dimethylibenzylidene) sorbitol (DMDBS), a well-known, third-generation sorbitol derivative, was used as a nucleating agent in this study. Crystallization kinetic parameters obtained from DSC cooling curves showed that incorporation of a nucleating agent by means of a masterbatch increased the crystallization rate by approximately two times compared to that of the sample with the same concentration of nucleating agent without the use of a masterbatch. The differences in nonisothermal kinetic parameters seemed to increase in significance with decreasing cooling rate.
The effect of the nucleating agent masterbatch carrier resin on the nonisothermal crystallization of a pipe-grade polypropylene block copolymer was investigated at three different cooling rates using differential scanning calorimetry (DSC). Crystallization kinetic parameters obtained from DSC cooling curves showed that incorporation of a nucleating agent by means of a masterbatch increased the crystallization rate by approximately two times compared to that of the sample with the same concentration of nucleating agent without the use of a masterbatch.
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1 Sharif University of Technology, Polymeric Materials Research Group (PMRG), Department of Materials Science and Engineering, Tehran, Iran (GRID:grid.412553.4) (ISNI:0000 0001 0740 9747)
2 Urmia University, Department of Materials Science and Engineering, Faculty of Engineering, Urmia, Iran (GRID:grid.412763.5) (ISNI:0000 0004 0442 8645)