Effect of Modified Hydrotalcite on Flame Retardant and Mechanical Properties of Polypropylene
DOI:
CSTR:
Author:
Affiliation:

Clc Number:

TB34

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Mg/Al-CO3-LDHs precursors were prepared by coprecipitation method from magnesium nitrate and aluminium nitrate, and then the composite modified hydrotalcites (ITA-LDHs) with the itaconic acid intercalation and titanate copling agent NDZ-201 was prepared by anion exchange method. Polypropylene (PP) composites with good flame retardancy and good mechanical properties were prepared by melt blending. The structure of ITA-LDHs were characterized by FTIR, XRD, TGA and SEM. The results showed that the CO32- was replaced partly by itaconic acid, titanate coupling agent was attached on the surface of hydrotalcites. The limit oxygen index(LOI), vertical burning test(UL-94),TGA , HRR, THR and mass loss rate indicated that with the increase of the addition of hydrotalcites, both unmodified and modified LDHs can play a flame retardant effect on PP, and the modified LDHs effect is better than that of the unmodified LDHs. When the addition of hydrotalcites are 30% (based on the quality of 100g polypropylene), the LOI value of ITA-LDHs reaches 27.5%, which is significantly better than that of the unmodified 25.5%, and the UL-94 grade reaches V0 level, which is better than that of the unmodified V1 grade. By testing the bending strength and tensile strength of the material, it can be seen that the mechanical properties of the modified hydrotalcites are obviously improved compared with the unmodified hydrotalcite.

    Reference
    Related
    Cited by
Get Citation
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:August 27,2018
  • Revised:January 21,2019
  • Adopted:January 22,2019
  • Online: April 24,2019
  • Published:
Article QR Code