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Influence of β-nucleating agent on the mechanics and crystallization characteristics of polypropylene

✍ Scribed by Puyu Zhang; Xiaoxia Liu; Yongqiang Li

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
109 KB
Volume
434
Category
Article
ISSN
0921-5093

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✦ Synopsis

Commercial-grade isotactic polypropylene (iPP) was modified with a specific acylamino-nucleator (␤-nucleator) in concentrations from 0.1 wt.% to 0.5 wt.%. The mechanical properties of ␤-nucleated polypropylene were studied. The results showed that the ␤-nucleating agent had outstanding properties in increasing the toughness of iPP. The impact strength rised to 67.76 J/m 2 from 36.09 J/m 2 original, elongation at break of iPP was improved from 499% to 144% by adding ␤-nucleating agent. The reason of the increase of mechanical properties has been ascribed to a specific structure of the amorphous tied-molecule induced by the presence of the ␤-nucleating agent. The nonisothermal crystallization behavior of iPP and ␤-nucleated iPP were studied by means of differential scanning calorimetry (DSC).

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