文献类型：期刊文献

英文题名：Rigid polyisocyanurate-waterglass foam composite: Preparation, mechanism, and thermal and flame-retardant properties

作者：Feng, Guo-Dong[1,2] Hu, Li-Hong[1,3] Ma, Yan[1] Zhang, Meng[1] Liu, Cheng-Guo[1] Zhou, Yong-Hong[1,2,4]

第一作者：Feng, Guo-Dong;冯国东

通信作者：Zhou, YH[1];Zhou, YH[2];Zhou, YH[3]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China;[2]Jiangsu Qianglin Bioenergy & Biomat Ltd Co, Li Yang 213364, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Inst New Technol Forestry, Beijing 100091, Peoples R China;[4]Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China

年份：2018

卷号：135

期号：17

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20180304660632);Scopus(收录号：2-s2.0-85040609928);WOS:【SCI-EXPANDED(收录号:WOS:000423416300014)】；

基金：The authors are grateful for the financial support of the National Natural Science Foundation of China (contract grant numbers 31700503, 31470613, and 31300489) and the Jiangsu Province Natural Science Foundation of China (grant BK20170160).

语种：英文

外文关键词：composites; degradation; foams; thermal properties

摘要：A rigid polyisocyanurate-waterglass foam (PIWGRF) composite was prepared with polyaryl poly(methylene isocyanate) and waterglass (WG) as the main materials; water as a blowing agent, and no polyols. We speculated the formation mechanism of the PIWGRFs on the basis of the analysis of experiment data, scanning electron microscopy characterization, and transmission electron microscopy. The results show that three-dimensional nanoflakes derived from the cured WG was observed; this was connected with polyisocyanurate by secondary bonding (SiOHN). Thermogravimetric testing indicated that the thermal stability and residual mass (34%) of the PIWGRFs were significantly higher than those of rigid traditional polyurethane foams (T-PUFs). When the core density of the PIWGRFs was 32.6kg/m(3), the strength was up to 162.9 KPa by excessive filling. The flame retardancy of the PIWGRFs, including the time to ignition, heat-release rate, total smoke of release, and limiting oxygen index, was obviously better than that of the T-PUFs. The structure of the residual char was more dense and orderly; this was also an effective barrier layer. The reason was attributed to the fact that the WG did not contain combustible elements. So, the PIWGRFs had excellent thermal stability, flame retardancy, and environmental friendliness. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46182.