期刊
POLYMER DEGRADATION AND STABILITY
卷 129, 期 -, 页码 63-76出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2016.03.023
关键词
Flame retardant; Polystyrene; Phosphorus; Disulfides; Synergism; Quantum chemical calculation
资金
- BASF SE
A highly efficient halogen-free flame retardant system for polystyrene foams consisting of phosphor organic compounds and synergists of the general structure R-S-S-R is described here and mechanistic details of its mode of action are given. Compared to the corresponding individual components, the flame retarding effect is enhanced or actually imparted by the use of various combinations of those compounds. Among the disulfides investigated bis(benzothiazolyl)disulfide showed the best synergistic effect. Bis(diphenylphosphinothiolyl)disulfide as a one-component flame retardant combining phosphorous entities and a disulfide bridge in one molecule exhibits a similar flame retardant efficiency. Polystyrene samples containing these additives were analyzed by thermal desorption mass spectrometry (TD-MS), whereby the release of S-2-fragments during the thermal decomposition of the disulfides could be detected even in the case of systems for which a cleavage of S-S bonds would rather be expected. Based on these experiments and extensive quantum chemical calculations a conclusive mechanism is derived, which can help to design future flame retardant additives. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据