Flame retardancy and thermal stability of organic-inorganic hybrid resins based on polyhedral oligomeric silsesquioxanes and montmorillonite clay
Flame retardancy and thermal stability of organic-inorganic hybrid resins based on polyhedral oligomeric silsesquioxanes and montmorillonite clay
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DOI：
10.1016/j.compositesb.2014.03.023
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发表时间：
2014-07-01
影响因子：
13.1
通讯作者：
Bouza, R.
中科院分区：
文献类型：
--
作者：
Montero, B.;Bellas, R.;Bouza, R.
将三硅醇异丁基POSS（TSP）和异丁基铝POMS（AlP）两种笼型低聚倍半硅氧烷与有机粘土（OC）混合，在环氧胺体系中制备了有机-无机杂化材料，差示扫描量热法（DSC）表明AlP具有很强的催化能力。OC也显示出催化能力，但程度较低。储能模量随着POSS含量的降低而增加，这是由于POSS核的纳米增强效应。在较高浓度下，由于POSS聚集，模量强烈降低。FOSS和OC在高温区提供了更好的热稳定性，并且由于硅物种的形成，炭残留物随着填料浓度的增加而增加。由于形成了多层碳质硅酸盐结构，POSS的添加提高了阻燃性。AlP复合材料中金属原子的存在可能有助于通过二次化学反应来稳定。(C)2014爱思唯尔有限公司版权所有。
Organic-inorganic hybrids were prepared by incorporation of two polyhedral oligomeric silsesquioxanes, trisilanolisobutyl POSS (TSP) and isobutylAluminum POMS (AlP), and an organoclay (OC), in an epoxyamine system.Differential scanning calorimetry revealed the great catalytic power of AlP. OC also showed catalytic power, but to a lesser extent. The storage modulus increased with lower POSS contents, due to the nanoreinforcing effect of POSS core. At higher concentration, the modulus strongly decreases due to POSS aggregation. The glass transition temperature was barely affected by the POSS, whereas OC addition decreased it. FOSS and OC supplied greater thermal stability in high temperature regions, and the char residue increased with filler concentration because silicon species are formed. POSS addition improved the flame retardancy because of a multilayered carbonaceous silicate structure formation. The presence of metal atoms in AlP composites might contribute to stabilization through secondary chemical reactions. (C) 2014 Elsevier Ltd. All rights reserved.