硅烷偶联剂在涂料中的应用及其进展

介绍硅烷偶联剂的作用机理和常见的硅烷偶联剂品种,及其在涂料中的应用。并概述了我国硅烷偶联剂的生产和市场现状,2004年我国硅烷偶联剂总体产能约1万t/a,实际产量约8000t,据预测,2010年底我国硅烷偶联剂的产能将达到2万t/a。最后分析了我国涂料用硅烷偶联剂的发展趋势。     

硅烷偶联剂改性自交联水性聚氨酯的研究进展

综述了基于硅烷偶联剂室温自交联水性聚氨酯的制备方法、室温自交联固化机理及结构与性能之间的关系;硅烷偶联剂改性自交联WPU的性能、硅烷偶联剂改性特殊自交联WPU的制备、硅烷偶联剂复合交联改性WPU的制备;展望了硅烷偶联剂改性的水性聚氨酯高分子材料的发展方向和应用前景。     

白炭黑填充胶料的焦烧状况研究与改善

研究硅烷偶联剂对白炭黑填充胶料焦烧状况的改善。结果表明:与未添加硅烷偶联剂的胶料相比,添加硅烷偶联剂可显著促进胶料的白炭黑分散并抑制白炭黑在硫化过程中的絮凝,延长焦烧时间;由于形成了白炭黑-硅烷偶联剂TESPT-橡胶网络,硅烷偶联剂TESPT在促进白炭黑分散方面表现出更好的效果,而硅烷偶联剂OTES可以更有效地抑制白炭黑的絮凝,从而延长焦烧时间;两种硅烷偶联剂同时使用可进一步抑制白炭黑的团聚。     

硅烷偶联剂在聚合物改性中的应用及研究进展

硅烷偶联剂能增强聚合物性能,因而在工业生产与经济发展中有着广泛应用.本文在论述硅烷偶联剂结构及偶联机理的基础上,探究了现阶段硅烷偶联剂的研究现状,深度研讨硅烷偶联剂于聚合物改性中的实际应用,旨在为硅烷偶联剂更好地辅助聚合物性能提升带来更多思考和启迪.     

硅烷偶联剂在橡胶中的应用研究进展

介绍硅烷偶联剂在橡胶工业中的应用研究进展,展望橡胶用硅烷偶联剂的发展趋势和应用前景。硅烷偶联剂的使用大大提高了橡胶制品的综合性能,促进了无机填料在橡胶工业中的应用。目前橡胶用硅烷偶联剂主要种类为含硫烃基类、乙烯基类、甲基丙烯酰氧烷基类、氨烃基类和环氧烃基类。随着新型轮胎和橡胶制品的快速发展,市场对橡胶用硅烷偶联剂的性能和使用技术也提出更高的要求,尤其是轮胎绿色化进程的加快,对硅烷偶联剂的需求快速增长,以NXT为代表的新型硅烷偶联剂是未来橡胶用硅烷偶联剂的发展方向之一。     

硅烷偶联剂的合成、发展与应用

本文介绍了目前国内外硅烷偶联剂的主要合成技术、生产现状及应用开发情况,并进一步报道了硅烷偶联剂表面改性机理及硅烷偶联剂在塑料、涂料、建筑等行业的应用,展望了硅烷偶联剂的发展前景。     

含硫硅烷偶联剂对增强填料的改性及其在橡胶中的应用研究进展

综述了含硫硅烷偶联剂改性增强填料(炭黑、白炭黑、淀粉、纤维素等)对填料在橡胶基质中分散性、相容性和结构性以及功能性的影响;介绍了从多硫硅烷偶联剂到巯基硅烷偶联剂和硫代羧酸酯类含硫硅烷偶联剂的改进和应用进展;指出在绿色轮胎发展趋势下,新型含硫硅烷偶联剂的开发应向绿色高效的功能化方向发展。     

硅烷偶联剂提升胶粘剂和粘接性能卓有成效

介绍了有机硅烷偶联剂的结构特点;概述了近年来硅烷偶联剂在胶粘剂和粘接技术方面的应用效果;指出了悉心采用硅烷偶联剂则是胶粘剂和粘接性能改善的有效途径。     

硅烷偶联剂在橡胶中的应用研究进展(续完)

介绍硅烷偶联剂在橡胶工业中的应用研究进展,展望橡胶用硅烷偶联剂的发展趋势和应用前景。硅烷偶联剂的使用大大提高了橡胶制品的综合性能,促进了无机填料在橡胶工业中的应用。目前橡胶用硅烷偶联剂主要种类为含硫烃基类、乙烯基类、甲基丙烯酰氧烷基类、氨烃基类和环氧烃基类。随着新型轮胎和橡胶制品的快速发展,市场对橡胶用硅烷偶联剂的性能和使用技术也提出更高的要求,尤其是轮胎绿色化进程的加快,对硅烷偶联剂的需求快速增长,以NXT为代表的新型硅烷偶联剂是未来橡胶用硅烷偶联剂的发展方向之一。     

如何受益硅烷偶联剂的奇妙功效

介绍了硅烷偶联剂的常规品种和新型产品：简述了硅烷偶联剂的作用机理和性能改进；总结了硅烷偶联剂的使用方法和注意要点：提出了只有正确使用才能奇效凸显，获益匪浅。     

硅烷偶联剂封端改性水性聚氨酯的研究

以聚醚多元醇(GE210)、异佛尔酮二异氰酸酯(IPDI)和α,α-二羟甲基丙酸(DMPA)为原料合成了基础聚氨酯(PU)预聚体,然后以1,4-丁二醇进一步扩链制得了水性聚氨酯(WPU)乳液,最后以偶联剂γ-氨丙基三甲氧基硅烷对PU分子进行封端,得到了稳定的改性PU乳液。通过对偶联剂的用量和封端条件等研究,确定了适合硅烷改性WPU的方式。实验结果表明,当w(硅烷偶联剂)=4%～5%时(占树脂的质量分数),硅烷偶联剂封端改性WPU乳液具有较低的表面张力,其胶膜的力学性能和耐水耐溶剂性能均相当优异。     

硅烷偶联剂对复合水泥砂浆性能的影响

通过红外光谱分析及砂浆强度测试，研究了硅烷偶联剂对不同种类复合水泥砂浆的稠度、分层度、抗折强度及抗压强度的影响。结果表明，加入硅烷偶联剂能提高普通水泥砂浆、苯丙胶乳改性水泥砂浆的抗折强度和抗压强度；当硅烷偶联剂质量分数为0．5％时，普通水泥砂浆的抗折强度和抗压强度达到极大值，提高约10％；当硅烷偶联剂质量分数为1％时，苯丙胶乳改性水泥砂浆的抗折强度和抗压强度达到极大值，提高约20％；同时，硅烷偶联剂还能增大普通水泥砂浆和苯丙胶乳改性水泥砂浆的稠度，但砂浆的分层度略有增大。加入经硅烷偶联剂处理的钢纤维，能够提高普通水泥砂浆及苯丙胶乳改性水泥砂浆的抗折强度和抗压强度；当钢纤维用硅烷偶联剂质量分数为1％的硅烷偶联剂水溶液处理时，钢纤维增强砂浆的抗折、抗压强度达到极大值，提高10％以上。     

硅烷偶联剂的应用进展

简要介绍了硅烷偶联剂的偶联机理、选用原则及其在复合材料中的应用，包括用作玻璃纤维的处理剂、无机粉末填料的处理剂和胶粘剂、密封剂的增粘剂；另外，还介绍了硅烷偶联剂对橡胶性能的影响。     

功能化硅烷偶联剂的制备与性能研究

研究功能化硅烷偶联剂的制备及其对轮胎胎面基部胶性能的影响。结果表明:与偶联剂Si69和抗硫化返原剂PK900相比,加入功能化硅烷偶联剂的硫化胶拉伸强度增大,老化后300%定伸应力和拉伸强度增大,抗硫化返原性能提高,压缩生热降低。     

硅烷偶联剂在聚合物基复合材料增容改性中的应用

综述硅烷偶联剂在聚合物复合材料中的增容机理及使用方法，硅烷偶联剂在玻璃纤维增强复合材料，无机粒子填充复合材料，聚合物共混改性及新型聚合物基复合材料中的应用，为硅烷偶联剂的深入研究及拓展应用提供参考依据。     

Influence of polymer–filler interactions on retraction behaviors of natural rubber vulcanizates reinforced with silica and carbon black

In general, silica‐filled rubber compounds contain a silane coupling agent to improve the filler dispersion and polymer–filler interactions. The silane coupling agent modifies the silica surface and makes crosslinks between the rubber and the silica. Influence of the modification of silica on the retraction behaviors of natural rubber (NR) vulcanizates reinforced with silica and carbon black was studied. Variation of the retraction behaviors of NR vulcanizates with filler composition was also investigated. The vulcanizates containing the silane coupling agent were recovered faster than those without the silane coupling agent. The recovery difference between the vulcanizates without and with the silane coupling agent increased with increased silica content. For the vulcanizates containing the silane coupling agent, the retraction behaviors were nearly the same, irrespective of filler composition. But, for the vulcanizates without the silane coupling agent, the vulcanizate was recovered more and more slowly as the silica content increased. The experimental results are explained with the polymer–filler interactions, modification of silica surface, and formation of crosslinks between silica and rubber. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 691–696, 2006     

偶联剂与等离子体协同表面处理对聚乙烯木塑复合材胶接性能的影响

采用硅烷偶联剂涂覆与等离子体协同处理的方法,对聚乙烯木塑复合材料进行表面处理以改善其胶接性能。研究了硅烷偶联剂浓度、等离子体处理时间、等离子体喷头距试件的处理距离对胶接强度的影响,优化了协同处理工艺。利用接触角测试、红外光谱分析研究了协同表面处理前后材料的表面性质变化,并对胶接接头的耐水性能进行了测试。结果表明:利用偶联剂涂覆和等离子体的协同处理,可以既提高胶接强度,又改善胶接接头的耐水性能。协同处理受偶联剂涂覆和等离子体处理的工艺因素影响较大,选取的优选处理工艺为偶联剂浓度为5%、等离子体处理时间为30s、处理距离为30mm。     

High-performance poly(lactic acid)/starch materials prepared via starch surface modification and its in situ enhancement

High-performance modified poly(lactic acid) (PLA)/starch (ST) blends were prepared by incorporating silane coupling agent. The coupling agent acted as a bridge between PLA and ST components, enhancing their interfacial compatibility during the melt blending. The addition of epoxy-functionalized silane coupling agent improved the interfacial adhesion between PLA and ST phases, as evidenced by the decreased number and spacing of gaps between the ST particles and PLA matrix. The coupling agent also filled the surface crack of the ST particles, improving their dispersion in PLA matrix. The tensile strength of the modified PLA/ST blend increased from 19.6 MPa for the neat PLA/ST blend to 53.4 MPa, exceeding that of neat PLA. The modified blend also showed improved hydrophobicity and thermal stability. This research presented an effective approach to reducing the cost of PLA-based materials and improving the performance of ST-filled PLA materials by enhancing the interfacial adhesion between ST and PLA through surface modification with silane coupling agent. It provided a simple and feasible strategy for the high-performance modification of polyester/ST materials.     

Effects of a silane coupling agent on the exfoliation of organoclay layers in polyurethane/organoclay nanocomposite foams?

An attempt was made to synthesize polyurethane (PU)/organoclay nanocomposite foams with high thermal insulation properties. The organoclay was modified by polymeric 4,4′‐diphenylmethane diisocyanate (PMDI) with a silane coupling agent. The structure of the organoclay‐modified PMDI with the silane coupling agent was determined by Fourier transform infrared spectroscopy and nuclear magnetic resonance. Transmission electron micrographs and wide‐angle X‐ray diffraction patterns showed that the interlayer distance increased for the PU/organoclay nanocomposites with the addition of the silane coupling agent. It was expected that the distance between the organoclay layers would increase and that the organoclay would be dispersed on a nanoscale in the PU matrix because of the organic/inorganic hybrid bond formation between the organoclay and silane coupling agent. Compressive and flexural strengths of the PU/silane coupling agent/organoclay nanocomposite foams were similar to those of the PU/organoclay nanocomposite foams. However, the thermal conductivity appreciably decreased from 0.0250 to 0.0230 W/m h °C in the PU/silane coupling agent/organoclay nanocomposite foams. Scanning electron micrographs showed that the cell size of the PU/silane coupling agent/clay nanocomposite foams also decreased. On the basis of these results, it is suggested that the smaller cell size and lower thermal conductivity of the PU/silane coupling agent/organoclay nanocomposite foams were mainly due to enhanced exfoliation of the organoclay layers by the silane coupling reaction. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

改性粉煤灰填充SBS复合材料流动性能研究

采用硅烷偶联剂和钛酸酯偶联剂分别对粉煤灰进行改性,并用熔融共混法制备了改性粉煤灰填充SBS（styrene-butadiene-styrene）复合材料,考察了复合材料的流动性能。研究表明：在实验考察的用量范围内,两种偶联剂改性粉煤灰填充SBS复合材料的流动性均随用量的增加而降低;当改性粉煤灰用量相同时,硅烷偶联剂改性粉煤灰填充SBS复合材料的熔融指数较钛酸酯偶联剂改性的小,流动性较差。