Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 132, Issue 2, Pages 1145-1152Publisher
SPRINGER
DOI: 10.1007/s10973-018-7043-z
Keywords
Compound nucleating agent; Calcium sulfate whiskers; Isotactic polypropylene; Synergistic effect
Funding
- National Natural Science Foundation of China [21376031]
- Scientific Research Fund of Hunan Provincial Education Department [16A004]
- Research Innovation Program for College Graduates of Hunan Province [CX2016B416]
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The silane coupling agent KH-550 was used to perform surface modification on calcium sulfate whiskers (CSW). Fourier transform infrared spectroscopy and thermogravimetric analysis were used to characterize the effect of surface modification on enhancing the compatibility of CSW with isotactic polypropylene (iPP). Subsequently, the synergetic effect of CSW modified by KH-550 (K-CSW) and aryl amide beta-nucleating agent dicyclohexyl-terephthalamide (commercial name: TMB-5) on increasing the relative content of beta-crystals and the peak crystallization temperature of iPP was studied. The results showed that KH-550 was a suitable surfactant for surface modification of CSW and K-CSW had certain beta-nucleating abilities for iPP. Moreover, for iPP nucleated with the K-CSW/TMB-5, the higher peak crystallization temperature and relative content of beta-crystals (K (beta) = 0.84) were achieved, which were obviously better than those of iPP nucleated with K-CSW or TMB-5 independently, demonstrating that K-CSW/TMB-5 was a novel highly efficient compound beta-nucleating agent for iPP and had certain synergistic effect for formation of beta crystals.
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