Next Article in Journal
Study on Stability and Stability Mechanism of Styrene-Acrylic Emulsion Prepared Using Nanocellulose Modified with Long-Chain Fatty Acids
Previous Article in Journal
Effect of a Dual Functional Polymer on the Electro-Optical Properties of Blue Phase Liquid Crystals
Article Menu

Export Article

Open AccessArticle

Flame Retardancy and Toughness of Poly(Lactic Acid)/GNR/SiAHP Composites

1
Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China
2
School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(7), 1129; https://doi.org/10.3390/polym11071129
Received: 17 June 2019 / Revised: 27 June 2019 / Accepted: 27 June 2019 / Published: 3 July 2019
  |  
PDF [5166 KB, uploaded 3 July 2019]
  |  

Abstract

A novel flame-retardant and toughened bio-based poly(lactic acid) (PLA)/glycidyl methacrylate-grafted natural rubber (GNR) composite was fabricated by sequentially dynamical vulcanizing and reactive melt-blending. The surface modification of aluminum hypophosphite (AHP) enhanced the interfacial compatibility between the modified aluminum hypophosphite by silane (SiAHP) and PLA/GNR matrix and the charring ability of the PLA/GNR/SiAHP composites to a certain extent, and the toughness and flame retardancy of the PLA/GNR/SiAHP composites were slightly higher than those of PLA/GNR/AHP composites, respectively. The notched impact strength and elongation of the PLA composite with 20 wt. %GNR and 18 wt.% SiAHP were 13.1 kJ/m2 and 72%, approximately 385% and 17 fold higher than those of PLA, respectively, and its limiting oxygen index increased to 26.5% and a UL-94 V-0 rating was achieved. Notedly, the very serious melt-dripping characteristics of PLA during combustion was completely suppressed. The peak heat release rate and total heat release values of the PLA/GNR/SiAHP composites dramatically reduced, and the char yield obviously increased with an increasing SiAHP content in the cone calorimeter test. The good flame retardancy of the PLA/GNR/SiAHP composites was suggested to be the result of a synergistic effect involving gaseous and condensed phase flame-retardant mechanisms. The high-performance flame-retardant PLA/GNR/SiAHP composites have great potential application as replacements for petroleum-based polymers in the automotive interior and building fields. View Full-Text
Keywords: PLA composite; flame retardancy; toughness; melt-dripping resistance; surface modification PLA composite; flame retardancy; toughness; melt-dripping resistance; surface modification
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Wu, N.; Yu, J.; Lang, W.; Ma, X.; Yang, Y. Flame Retardancy and Toughness of Poly(Lactic Acid)/GNR/SiAHP Composites. Polymers 2019, 11, 1129.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top