偶联剂改性填充剂在橡胶中的应用

比较不同种类偶联剂改性白炭黑和碳酸钙对胶料性能的影响及偶联剂用量对胶料物性的影响。结果表明：偶联剂Si-69对白炭黑的改性效果比钛酸酯偶联剂改性效果优越；偶联剂改性碳酸钙填充硫化胶的性能与未填充碳酸钙胶料的性能接近，并提高产品性价比，偶联剂Si-69在胶料中的用量以无机填料用量的4%-6%左右效果较好。     

滑石粉表面改性填充PP复合体系研究

采用钛酸酯、铝酸酯、硼酸酯及硅烷偶联剂,对滑石粉进行表面改性处理,通过接触角、活化率、吸油量和红外谱图等试验方法对改性效果进行了评定;检测滑石粉填充PP复合体系的力学性能,进一步说明了偶联剂种类和填料粒径对复合材料力学性能的影响。结果表明:活化改性后,填料表面的极性和官能团均发生了变化;硅烷和钛酸酯偶联剂改性滑石粉效果较好,1250目滑石粉填充体系的综合力学性能最优。     

聚烯烃填充母料的研制

以LDPE为载体,滑石粉和CaCo_3为填料,分别以钛酸酯和铝酸酯作偶联剂,对滑石粉和CaCO_3进行活化处理,制成高填充聚烯烃母料。并对其以不同的配比填充PE时的物理机械性能和流动性进行了研究。     

钛酸酯偶联剂对尼龙1010填充体系流变性的影响

本文研究不同结构的钛酸酯偶联剂处理CaCO_3填料填充尼龙1010体系的熔体流动性。从体系粘度下降程度,结合偶联机理判断偶联剂的偶联效果。     

多硫杂脂肪族二酸双(2,2-二羟甲基-1,3-丙二醇)单酯的制备及其在橡胶中的应用

合成了以3,4,5,6-四硫杂辛二酸双(2,2-二羟甲基-1,3-丙二醇)单酯为代表的多羟基多硫化物偶联剂。考察了不同用量偶联剂与无机填料(白炭黑、陶土、轻质碳酸钙)的配合对胶料的共补强效果。结果表明,加入适量偶联剂,明显促进橡胶与填料间的结合,改善硫化胶的力学性能;在该偶联剂体系中,硫含量较高的偶联剂作用更为显著,其对白炭黑和陶土填充胶料的作用明显高于轻质碳酸钙填充胶料。     

羧化聚丁二烯作为偶联剂在无机填料混炼胶中的应用

硅烷是已确立的用于填充陶土和白炭黑混炼胶的偶联剂,但它对于非硅类填料如碳酸钙,不太有效。最近有人开发了钛酸酯和铝锆酸酯偶联剂体系,并声称其对于非硅类填料是有效的然而,它们所起的作用似乎只是有效地分散而不是真正的偶联。最初开发的羧化不饱和聚合物用作碳酸钙的活性涂层。现在已经证明它们对各种填充矿物填料的弹性体体系来说是优良的偶联剂,能有效地改善填料-聚合物界面的活性。     

钛酸酯偶联剂对填充聚烯烃的机械性能和流变性的影响

本实验研究了钛酸酯偶联剂对微粒填充的聚烯烃熔融物流变性的影响。无机填料用碳酸钙、滑石粉和玻璃纤维;聚烯烃用高密度聚乙烯(HDPE)和聚丙烯(PP)。发现偶联剂(Kenrich石油化学厂的TTS和EDTS—201)使填充聚烯烃的熔融粘度明显降低。而使用不同的无机填充物和偶联剂,对注射模塑制品的机械性能的影响依次进行了研究。发现添加钛酸酯偶联剂的结果,使模量和拉伸强度降低,而填充体系的流变性和抗冲击强度增加。发现PP—CaCO_3—TTS和HDPE—EDTS 201体系随着钛酸酯偶联剂的增加,冲击强度的改善接近100％。PP—CaCO_3—TTS制品的极限拉伸伸长率接近纯PP。     

OL—T橡塑填充剂的应用

OL—T橡塑填充剂是由OL—T671整合型钛酸酯偶联剂对无机填料碳酸钙进行表面处理所得产品,是对橡胶具有补强和填充作用的新型材料。钛酸酯偶联剂是美国肯尼奇石油化学公司于七十年代中期发展起来的一类新型偶联剂,其结构通式为(RO-)_m-Ti-(-OX—R′—Y)_n,其中m+n≤6。偶联机理一般认为是其结构单元中的烷氧基与无机填料表面的—OH基反应而成化学键,使偶联剂与     

一种新型偶联剂的研制与应用

研究了以低分子量聚乙烯为骨架，接枝低碳数脂肪酸而成的一种新型偶联剂，并且与钛酸酯联剂进行性能比较，结果表明，用该研制偶联剂活化处理无机填料填充树脂，可以提高体系的流动性，强度，热变形温度等性能，并且在相同条件下，均优于钛酸酯偶联剂。     

丁腈橡胶/硼酸酯偶联剂改性纳米碳酸钙复合材料的性能

用硼酸酯偶联剂对纳米碳酸钙进行表面改性,研究了丁腈橡胶(NBR)硼/酸酯偶联剂改性纳米碳酸钙复合材料的性能。结果表明,使用硼酸酯偶联剂改性纳米碳酸钙填充NBR能提高硫化胶的物理机械性能,当硼酸酯偶联剂用量为4份、改性纳米碳酸钙用量为75份时,硫化胶的综合性能最好;与未改性纳米碳酸钙填充NBR相比,硼酸酯偶联剂改性纳米碳酸钙填充的NBR混炼胶和硫化胶的弹性模量较小,Payne效应减弱,而损耗因子却较大;用硼酸酯偶联剂改性纳米碳酸钙填充NBR,化学交联质量分数提高,无机粒子与橡胶基体之间的化学结合作用增强。     

不同无机填料在聚氨酯弹性体中的性能对比

以聚醚N-204、甲苯二异氰酸酯为原料,用1,4-丁二醇为扩链剂,填充经超声波分散、偶联处理的不同无机填料,分别合成填充型聚氨酯(PUR)弹性体。研究了填充型PUR弹性体的耐磨性、力学性能以及填料在弹性体中的分布状况。结果表明,不同无机填料在PUR弹性体中所表现出的性质不同,碳化硅主要提高了弹性体的耐磨性,而陶瓷微珠、玻璃微珠在增强增韧方面发挥了作用。     

Mechanical properties of particulate filled polymers

The mechanical properties of several types of inorganic fillers were investigated in a number of different thermoplastic polymers. The fillers included minerals, such as talc and silicon carbide, and metals, such as aluminum flake and stainless steel fibers. The polymers included General Electric's Noryl, acrylonitrile-butadiene-styrene terpolymer, polypropylene, and modified polypropylene. The talc and some of the aluminum flake were treated with coupling agents to improve interfacial adhesion to the polymers. The results showed that the modulus of the filled polymers was a function only of the concentration of filler used up to 40 volume percent filler. The tensile strength of the filled compositions depended very strongly on the degree of interfacial bond developed between the polymer and the filler. The interfacial bond strength depended on the effectiveness of the coupling agents and the inherent wetting ability of the polymer. Of the polymers investigated in this study, Noryl showed the greatest degree of inherent wetting to inorganic fillers. Chemical modification of polypropylene also resulted in greater adhesion to fillers. The impact strength of filled compounds had an even more complex response, because, in addition to the concentration of the filler, and strength of the polymerfiller interface, it depends on the mechanism of crack propagation.     

不同无机填料对聚氨酯弹性体性能的影响

以聚醚多元醇和TDI-80为原料,MOCA为扩链剂,填充不同无机填料,分别合成填充型聚氨酯弹性体,研究了不同无机填料对聚氨酯弹性体性能的影响。采用差示扫描量热分析（DSC）、热重分析（TG）、X射线衍射（XRD）、红外光谱（FT-IR）及力学性能等测试方法对填充型聚氨酯弹性体的结构与性能进行了表征和分析。结果表明,3种...     

莫来石与沉淀法白炭黑填充丁苯橡胶复合材料的性能比较

在双辊开炼机中将未处理或用质量分数为3%的硅烷偶联剂A-189处理的莫来石粉体加入到丁苯橡胶(SBR)中制成复合材料.研究莫来石的加入量对SBR性能的影响,并与沉淀法白炭黑填充的SBR的性能进行了比较.结果表明,莫来石粉体对SBR表现出半增强特性;与沉淀法白炭黑填充的SBR相比,SBR/莫来石复合材料表现出良好的硫化特...     

混炼工艺对全钢子午线轮胎胎面胶性能的影响

选用经硼酸酯干法改性的广西北海高岭土取代白炭黑,通过两种混炼工艺制备改性高岭土/天然橡胶复合材料。主要考察混炼工艺对橡胶复合材料力学性能的影响。实验结果表明,混炼工艺对不同填料填充的胶料硫化特性影响不一致,采用先加小料后加填料的混炼工艺的胶料门尼黏度略高,物理性能、耐老化性能整体较好,动态压缩性能略差。     

大分子相容剂在填充聚烯烃中的应用

综述了国内外大分子相容剂在填充聚烯烃塑料中的应用，以及大分子相容剂改性填充聚烯烃塑料的物理与力学性能；指出大分子相容剂用于填充塑料，能改善高分子基体与填料间界面粘结，提高填充塑料复合材料的物理与力学性能，比传统有机偶联剂更具特点。     

Azidosilane polymer—filler coupling agent

This new coupling agent shows promise for use in reinforcing hydrocarbon type polymers, such as polyolefins and polystyrene, with glass fibers and inexpensive mineral fillers. Sulfonyl azide derivatives readily form durable bonds to many thermoplastics at normal extrusion and molding temperatures, without the use of peroxide or sulfur-type curing agents. Alkoxy silanes, attached to the sulfonyl azide, hydrolyze in the known manner forming bonds to inorganic fillers. Using commercial compounding and injection molding procedures, 40 wt percent of mineral fillers containing 1 percentofan azidosilane coupling agent were incorporated in polypropylene. Very substantial improvements in tensile, flexural and heat distortion properties were obtained with little loss in impact strength. An initial evaluation in a filled polystyrene showed significant, but less dramatic, improvements.     

Effects of titanate coupling agents on the rheological and mechanical properties of filled polyolefins

An experimental study was carried out to investigate the effects of titanate coupling agents on the rheological properties of p articulate-filled polyolefin melts. Inorganic fillers used were CaCO₃, talc, and fiberglass, and polyolefins used were high-density polyethylene (HOPE) and polypropylene (PP). It was found that the addition of the coupling agent TTS to the PP-CaCO₃ and PP-fiberglass systems reduced the melt viscosity considerably, whereas the addition of the coupling agent ETDS-201 to the PP-talc and HDPE-talc systems affected the melt viscosity very little. Also carried out was an injection molding study to investigate the effects of different inorganic fillers and the titanate coupling agents used on the mechanical properties of the injection molded specimens. It was found that addition of titanate coupling agents generally resulted in reduced modulus and tensile strength, and increased elongation and impact strength of the filled systems. The PP-CaCO₃-TTS and HDPE-talc-ETDS 201 systems were found to have impact strength improved by approximately 100 percent with the addition of a titanate coupling agent. The PP-CaCO₃-TTS samples have ultimate tensile elongation approaching that of virgin PP.     

The dynamic mechanical analysis of epoxy–copper powder composites using azole compounds as coupling agents

The dynamic mechanical properties of cured epoxy resin have been studied in which copper powder treated or untreated with azole compounds was used as fillers. The untreated fillers do not shift the glass transition temperature of the matrix polymer of the composites, whereas the storage modulus rises with increasing content of fillers. The application of azole compounds as coupling agents, which could react with both copper and epoxy resin, extended the polymer–filler interactions. The composite filled with copper powder treated with benzotriazole shows a strong reinforcement effect and high resistance to moisture.     

无机填料的表面处理及其在导热天然橡胶复合材料中的应用

用季戊四醇、丙三醇和钛酸酯偶联剂分别对氧化铝、氧化镁和高岭土进行表面改性,并将改性填料填充天然橡胶(NR)制备了导热复合材料,考察了表面处理剂种类及其用量对无机填料的影响,并研究了季戊四醇改性氧化铝填充NR复合材料的硫化特性、物理机械性能和导热性能.结果表明,3种填料中季戊四醇的改性效果最好,且其用量为1.0～1.5份时对氧化铝的改性效果最佳;随着改性氧化铝填充量的增加,复合材料的最大转矩、300%定伸应力、拉伸强度和热导率均增大,当其用量为60份时,改性氧化铝填充NR复合材料的热导率比未填充NR复合材料提高了23.9%.