Smoke suppression of [Glu]H2PW12O40in thermoplastic polyurethane elastomer

As is known there is a large amount of smoke released from the combustion process of thermoplastic polyurethane elastomer (TPU). To reduce the fire risk of TPU is one of the research contents in the fire safety fields. In this paper, [Glu]H(2)PW(12)O(40)was used as smoke suppressant in TPU, and the smoke suppression effect of [Glu]H(2)PW(12)O(40)was intensively investigated using nuclear magnetic resonance, scanning electron microscope, cone calorimeter test (CCT), smoke density test (SDT), and thermogravimetric analysis/infrared spectrometry, respectively. In the CCT test, the peak value of smoke production rate (SPR) of TPU-3 with 0.5 mass% of [Glu]H(2)PW(12)O(40)was 0.036 m(2) s(-1), reduced by 75% compared with the peak SPR value of TPU-0 without [Glu]H2PW12O40(0.145 m(2) s(-1)). [Glu]H(2)PW(12)O(40)could decrease the total smoke release (TSR) from 1560 to 694 m(2) m(-2). And [Glu]H(2)PW(12)O(40)could decrease the smoke factor from 1838 to 538 W m(-2). The SDT results showed that the luminous flux value of TPU-3 with 0.5 mass% of [Glu]H(2)PW(12)O(40)decreased by 30% compared with pure TPU at the end of the test without flame. The photographs from the CCT test showed that [Glu]H(2)PW(12)O(40)could promote char residue formation. TG test also revealed that [Glu]H(2)PW(12)O(40)could improve the thermal stability at high temperature. At the end of thermal decomposition, the mass of TPU-3 with 0.5 mass% of [Glu]H(2)PW(12)O(40)increased 6.3% compared with the mass of TPU-0 without [Glu]H2PW12O40. Based on the above result, it could be concluded that [Glu]H(2)PW(12)O(40)can suppress smoke generation by promoting char generation. In addition, [Glu]H(2)PW(12)O(40)has a good prospect in smoke suppression of TPU.

Automated summary

The study examined the smoke suppression effect of [Glu] H(2)PW(12)O(40) as a smoke suppressant in TPU, revealing significant reductions in smoke production rate, total smoke release, and smoke factor. The [Glu] H(2)PW(12)O(40) also contributed to increased char residue formation and improved thermal stability of TPU at high temperatures, suggesting its potential for smoke suppression in TPU.