文献类型：期刊文献

英文题名：Preparation and fire behavior of rigid polyurethane foams synthesized from modified urea-melamine-formaldehyde resins

作者：Zhu, Heng[1];Xu, Shi-ai[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Qinghai Univ, Sch Chem Engn, Xining 810016, Qinghai, Peoples R China

年份：2018

卷号：8

期号：32

起止页码：17879

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20182205240114);WOS:【SCI-EXPANDED(收录号:WOS:000435824500030)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 51463020), the Foundation from Qinghai Science and Technology Department (2017-HZ-803), Thousand Talents Program of Qinghai Province and Kunlun Scholar Award Program of Qinghai Province.

语种：英文

外文关键词：Urea formaldehyde resins - Thermogravimetric analysis - Ethylene - Rigid foamed plastics - Urea - Formaldehyde - Polyols - Polyurethanes - Acetal resins - Fourier transform infrared spectroscopy - Metabolism - Scanning electron microscopy - Smoke - Synthetic resins

摘要：In this study, a series of ethylene glycol modified urea-melamine-formaldehyde resins (EUMFs) were synthesized from urea, melamine, paraformaldehyde and ethylene glycol, and then incorporated into rigid polyurethane foams (RPUFs) as a reactive-type liquid flame retardant. The structure of EUMFs was characterized by Fourier transform infrared spectrometry; the morphology of the foams was characterized by scanning electron microscopy; and the thermal degradation and fire behavior of RPUFs were characterized by limiting oxygen index (LOI), cone calorimetry test and thermogravimetry analysis. The results show that the incorporation of EUMFs results in an increase in thermal stability, smoke suppression and LOI of RPUFs. As the melamine loading in EUMFs increases, the peak heat release rate and the total heat release of RPUFs decrease significantly, but the LOI increases slightly. Compared with the original foam, the cells of RPUFs become less regular with nonuniform diameters. In general, EUMFs show excellent flame retardancy and smoke suppression for RPUFs.