Effect of 1,3-2,4-di(p-hydroxyl) Benzylidene Sorbitol on Mechanical Properties of Isotactic Polypropylene

Abstract

The compound 1,3-2,4-di(p-hydroxyl) benzylidene sorbitol, acted as an effective nucleating agent, was synthesized by acetal method from p-hydroxyl benzaldehyde and D-sorbitol. The influence of nucleating agent concentration on crystallization morphology and mechanical properties of isotactic polypropylene (IPP) was investigated using polarization microscope (PLM) and CMT6104 microcomputer control universal test machine. The results showed that crystallinity of IPP increased and spherulite size tended to decline with increasing nucleating agent, because of nucleating agent showed a heterogeneous nucleation effect. IPP with 0.2 wt% nucleating agent show a considerable improvement in mechanical properties.

Keywords:

• Crystallinity
• Mechanical properties
• Nucleating agent
• Polypropylene

ACKNOWLEDGMENTS

The authors would like to acknowledge financial support from the National Nature Science Foundation of China (Grant number: 20871108).