Measurement of Pyrolysis Properties for Fire Spread Simulations of Spray Polyurethane Foam

Abstract

In this study, measurements and a review of the pyrolysis properties required for fire spread simulations of rigid spray polyurethane foam (SPF) were performed. The change in the mass ratio of the hardener and resin during the foaming of the SPF had little effect on the reference temperature and reaction rate at which the pyrolysis reaction most actively occurred. As the heating rate increased in TGA, a higher pyrolysis reaction rate was predicted. The Kissinger method to calculate the activation energy (<i>E<sub>a</sub></i>) under various heating rates was expected to more accurately predict fire spread phenomena compared to the method that applied <i>T<sub>p</sub></i> and <i>r<sub>p</sub></i> measured with a single heating rate. However, the <i>E<sub>a</sub></i> determined by the Kissinger method was similar to the value at a degree of conversion of approximately 30% using the Flynn-Wall-Ozawa method. Consequently, considering the initial fire spread on the SPF surface, the Kissinger method could potentially overestimate the fire spread rate.

Study on the Fire Risk of Blowing Agents during Spray-Type Polyurethane Foam Construction

“…기존 폴리우레탄폼 관련 연구를 분석해 보면 와 Oh Choi (5) 는 선박 건조작업장은 가연성 물질과 화기를 취급하는 작업이 연속되므로 폴리우레탄폼의 독성가스 방출과 열방출율을 저감 한 단열재가 개발되어야 한다고 제언하였다 등 . Mun (6) 은 경질 스프레이 폴리우레탄폼의 를 위해 열분해 물성을 측정하 FDS 여 열분해 반응이 일어나는 기준 온도 및 반응률 등을 측정하 였다 발포제에 따른 폴리우레탄폼의 발포 특성 및 물성 분석 . ｢ ｣ 을 연구한 과 Yun Kim (7) 은 폼의 온도상승 소도와 발포제의 가 스생성 속도를 고려하여 대체 발포제의 가능성을 확인하였다.…”