Grafting alkynyl groups on the surface of nano‐aramid fibers towards flame retardant thermoplastic polyurethane

In this work, para‐aramid fibers were dispersed into para‐aramid nanofibers (ANF) by deprotonation process, and then modified by 3‐chloropropyne (PC) via covalent bonding interaction. The resultant nanofiber (ANF‐PC) as a flame retardant was blended with thermoplastic polyurethane (TPU) to obtain fi...

Full description

Saved in:
Bibliographic Details
Published in:Polymers for advanced technologies 2022-06, Vol.33 (6), p.1831-1845
Main Authors: Liu, Wei, Dong, Huixin, Chen, Wenjiao, Piao, Junxiu, Ren, Jinyong, Wang, Yaofei, Wang, Yaxuan, Feng, Tingting, Jiao, Chuanmei, Chen, Xilei
Format: Article
Language:English
Subjects:
3‐chloropropyne
Aramid fiber reinforced plastics
covalent bonding
Dispersion
Enthalpy
flame retardant
Flame retardants
Graphitization
Heat release rate
Nanocomposites
Nanofibers
para‐aramid nanofiber
Polyurethane resins
Tensile strength
thermoplastic polyurethane
Urethane thermoplastic elastomers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, para‐aramid fibers were dispersed into para‐aramid nanofibers (ANF) by deprotonation process, and then modified by 3‐chloropropyne (PC) via covalent bonding interaction. The resultant nanofiber (ANF‐PC) as a flame retardant was blended with thermoplastic polyurethane (TPU) to obtain fire‐retardant TPU nanocomposites. The addition of 0.250 wt% ANF‐PC reduced the peak heat release rate, total heat release, total smoke release, and peak CO release rate of TPU by 47.7%, 31.5%, 16.4%, and 45.1%, respectively. The char yield of TPU/ANF‐PC0.250 was increased from 7.7% (TPU/ANF0.250) to 13.7%. The flame‐retardant effect of ANF‐PC in TPU composites can be attributed to its carbonization effect in the condensed phase, which increased the char yields and graphitization degree of char residue. In addition, the presence of ANF‐PC increased the tensile strength and breaking strain of TPU by 645% and 578% compared to untreated ANF, due to the improved dispersion state of ANF‐PC.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.5638