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Enhancing flame retardant and antistatic properties of polyamide 6 by a grafted multiwall carbon nanotubes
Author(s) -
Xue Boqiong,
Li Yuchun,
Guo Jia,
Sun Jun,
Liu Xiaodong,
Li Hongfei,
Gu Xiaoyu,
Zhang Sheng,
Jiang Shengling,
Zhang Zhiyuan
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50015
Subject(s) - antistatic agent , fire retardant , polyamide , materials science , char , carbon nanotube , percolation threshold , composite material , percolation (cognitive psychology) , chemical engineering , polymer chemistry , electrical resistivity and conductivity , layer (electronics) , pyrolysis , electrical engineering , neuroscience , engineering , biology
In order to improve the flame retardancy and antistatic properties of polyamide 6 (PA6) at as low amount of additives as possible, an integrated‐functional additive was synthesized by 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) and multiwalled carbon nanotubes (MWCNTs). The results showed 2 wt% of DOPO‐MWCNTs distributed in PA6 formed an electric network and decreased volume resistivity sharply to 3.1 × 10 8 Ω cm. In other words, it helped PA6 to get to the percolation threshold of semiconductor. By using of 3 wt% DOPO‐MWCNTs, the severe dripping in burning of PA6 was almost controlled. The possible reason was also ascribed to the network formed by evenly dispersed DOPO‐MWCNTs, which strengthened the char structure and held severe dripping of PA6. As a result, the heat and smoke release were also suppressed obviously. The most important is that CO release was about half cut in CONE test.