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Journal of Polymer Research

, 23:206 | Cite as

Joint effects of molecular structure and crystal morphology of organophosphate monovalent salts on nucleated isotactic poly(propylene)

  • Lijuan Long
  • Wentao He
  • Juan Li
  • Yushu Xiang
  • Shuhao Qin
  • Jie YuEmail author
  • Jingbo YinEmail author
ORIGINAL PAPER

Abstract

The nucleation ability of organophosphate monovalent salts in isotactic poly(propylene) (iPP) was elucidated from the crystalline morphology and molecular structure with different size of cationic radius (r) of substitute parts. Differential scanning calorimetry result showed that the degree of crystallinity of nucleated iPP increased linearly with the increasing of r following the order of lithium (NA-10), sodium (NA-11), potassium (NA-12), ammonium (NA-13) salts of 2,2′-methylene- bis-(4,6-di-t-butylphenylene) phosphate. Moreover, small-angle X-ray scattering result displayed a large increase in the periodical length of nucleated iPP, which arises from an increment of both lamella thickness and amorphous thickness. Further, at 0.15 wt% concentration, the haze values of nucleated iPP presented a decrease tendency in the order of iPP/NA-10 (16.7 %), iPP/NA-11 (15.1 %), iPP/NA-12 (14.6 %), iPP/NA-13 (14.8 %), and their flexural strength was increased by 26.2 %, 30.8 %, 31.4 % and 31.7 %, respectively, as comparison to virgin iPP. These results demonstrated that the nucleating ability of these nucleating agents increased with the increase of r of substitute parts.

Keywords

Nucleating agent Polypropylene Organophosphate monovalent salts Cationic radius Crystal morphology 

Notes

Acknowledgments

The work was financially supported by National Natural Science Foundation of China (51263003) and the Science and Technological Project of Guizhou Province ([2015]3008), And we gratefully acknowledge Shanghai Synchrotron Radiation Facility (SSRF).

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Department of Polymer MaterialsShanghai UniversityShanghaiChina
  2. 2.National Engineering Research Center for Compounding and Modification of Polymer MaterialsGuiyangChina

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