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首页> 外文期刊>Polymer engineering and science >The Effect of Layered Silicates on the Crosslinking Reaction of Silanol-Terminated Polysiloxane
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The Effect of Layered Silicates on the Crosslinking Reaction of Silanol-Terminated Polysiloxane

机译：层状硅酸盐对硅烷醇封端的聚硅氧烷交联反应的影响

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The effect of incorporation of clay nanoparticles on the vulcanization reaction of silanol-terminated polysiloxane was studied. Three different types of commercial clays were investigated as reinforcement, namely: Cloisite 20 A (organically modified with nonpolar aliphatic chains), Cloisite 30B (modified with aliphatic chains containing hydroxyl-end groups) and Nanofil 116, an unmodified montmorillonite as a reference. Nanoclays were found to increase the rate of curing, assessed by viscosity measurements, in all the examined systems and the acceleration rate is proportional to the content of the additive. Moreover, an increase of the area of peaks corresponding to the formation of SiOSi bonds (900-1200 cm(-1)) was recorded by FTIR spectroscopy for pure and reinforced poly(dimethylsiloxane) (PDMS). Temperature modulated differential scanning calorimetry was also used for accurately monitoring the curing reaction of organoclay/PDMS hybrids, through the heat capacity and the enthalpy of cold crystallization measurements. For pure PDMS low reaction rate was observed during the first 200 min, followed by fast acceleration. A linear increase of the reaction rate as a function of time was observed for the organoclay/PDMS hybrids. POLYM. ENG. SCI., 55:957-965, 2015. (c) 2014 Society of Plastics Engineers
机译：研究了粘土纳米粒子的掺入对硅烷醇封端的聚硅氧烷的硫化反应的影响。研究了三种不同类型的商品粘土作为增强材料，它们是：Cloisite 20 A（用非极性脂族链有机改性），Cloisite 30B（用含羟基端基的脂族链改性）和Nanofil 116（未改性的蒙脱土作为参考）。发现纳米粘土在所有检查的系统中均能提高固化速率（通过粘度测量评估），并且加速速率与添加剂的含量成正比。此外，对于纯的和增强的聚（二甲基硅氧烷）（PDMS），通过FTIR光谱记录了对应于SiOSi键（900-1200 cm（-1））形成的峰面积的增加。温度调制差示扫描量热法还用于通过热容量和冷结晶焓的测量来准确地监测有机粘土/ PDMS杂化物的固化反应。对于纯PDMS，在开始的200分钟内观察到低反应速率，然后快速加速。对于有机粘土/ PDMS杂化物，观察到反应速率随时间线性增加。 POLYM。 ENG。 SCI。，55：957-965，2015.（c）2014年塑料工程师学会

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