改性丁基橡胶

介绍氯化丁基橡胶、溴化丁基橡胶、磺化丁基橡胶、马来酸酐改性丁基橡胶、交联丁基橡胶、支化丁基橡胶、低相对分子质量丁基橡胶、液体丁基橡胶、丁基胶乳、丁基橡胶系弹性体和阻尼丁基橡胶及其他功能化丁基橡胶等的性能特点及用途。     

改性丁基橡胶

介绍氯化丁基橡胶、溴化丁基橡胶、磺化丁基橡胶、马来酸酐改性丁基橡胶、交联丁基橡胶、支化丁基橡胶、低相对分子质量丁基橡胶、液体丁基橡胶、丁基胶乳、丁基橡胶系弹性体和阻尼丁基橡胶及其他功能化丁基橡胶等的性能特点及用途。     

阻尼丁基橡胶

文中研究了丁基硫化橡胶的阻尼性能。结果表明，树脂用量、填充剂类型对丁基橡胶的阻尼性能有显著影响，采用树脂共混改性是获得宽温域高阻尼丁基橡胶的比较经济和有效的方法，添加填料可以明显改善丁基橡胶的高温阻尼性能，减少阻尼性能对温度的依赖程度。     

丁基橡胶的阻尼性能及其应用

丁基橡胶阻尼材料的研究包括：低温性能的改进和高温功能区的拓展。与其他弹性体并用共硫化，可改善其低温性能；与树脂共混，可使阻尼功能区向高温拓展，提高其高温阻尼性能。丁基橡胶共混改性的方法通常有2种：(1)采用动态硫化，将树脂混入丁基橡胶中；(2)加入丁基橡胶与第二组分的接枝或嵌段共聚物作增容剂进行共混。     

丁基橡胶功能化品种

介绍了丁基橡胶的衍生物如卤化丁基橡胶、磺化丁基橡胶、马来酸酐改性丁基橡胶、交联丁基橡胶、支化丁基橡胶、低分子量丁基橡胶、液体丁基橡胶、丁基橡胶系弹性体、高阻尼丁基橡胶等丁基橡胶功能化品种的性能、特点和用途。     

丁基橡胶的应用研究技术进展

丁基橡胶的性能优异,应用十分广泛,本文分别从丁基橡胶降噪材料、热塑弹性体材料、阻尼材料、密封材料、阻燃材料、防滑材料以及耐油橡胶材料的研究等几个方面主要介绍国内研究的进展情况。     

热空气老化粘弹性丁基橡胶阻尼材料的性能及其老化机理研究

采用热空气加速老化试验方法对粘弹性丁基橡胶阻尼材料的老化性能及其老化机理进行了研究,获得了老化前后丁基橡胶阻尼材料力学性能、阻尼性能及其变化规律。研究结果表明：在所选定的热空气老化65℃×310天试验条件下,阻尼材料的拉伸强度提高了1MPa,阻尼性能曲线整体向高温区域平移了10℃,而有效阻尼温域基本保持不变,与模拟计算结果一致,可以满足等效25℃×10年储存条件下的使用要求。同时,采用FTIR和SEM技术分析了阻尼材料在热氧老化条件下分子链结构和微观结构的变化,得到了粘弹性丁基橡胶阻尼材料的热空气老化机理。     

发泡工艺和发泡剂用量对丁基橡胶发泡材料阻尼吸声性能的影响

研究硫化时间、硫化温度以及偶氮二甲酰胺(AC)发泡剂用量对丁基橡胶发泡材料阻尼性能和吸声性能的影响。结果表明:在165℃下硫化30 min时,发泡丁基橡胶有最佳的阻尼性能;在160℃下硫化50 min时,发泡丁基橡胶有最佳的吸声性能。随着发泡剂AC的加入,丁基橡胶发泡材料的阻尼性能和吸声性能均有明显提升。当发泡剂AC用量较小时,材料阻尼性能较好;当发泡剂AC用量为6份时,材料吸声性能较好。     

阻尼氯化丁基橡胶配方优化设计

用正交实验设计法对氯化丁基橡胶（CIIR）的阻尼性能进行了研究。通过改变受阻酚、炭黑及硫磺的用量,对氯化丁基橡胶的综合性能及阻尼性能加以研完。     

丁基橡胶功能化品种

介绍了丁基橡胶的衍生物如卤化丁基橡胶，磺化丁基橡胶，马来酸酐改性丁基橡胶，交联丁基橡胶，支化丁基橡胶，低分子量丁基橡胶，液体丁基橡胶，丁基橡胶系弹性体，高阻尼丁基橡胶等丁基橡胶功能化品种的性能，特点和用途。     

橡胶阻尼材料的研究进展

分析了橡胶材料的阻尼机理,重点讨论了丙烯酸酯橡胶、聚氨酯、丁基橡胶、丁腈橡胶和聚乙酸乙烯酯橡胶经过改性制备橡胶阻尼材料的研究进展,指出了橡胶阻尼材料的发展方向。     

丁腈橡胶/橡塑材料并用研究进展

综述了近年来国内外丁腈橡胶与天然橡胶、丁苯橡胶、卤化丁基橡胶、三元乙丙橡胶、聚丙烯、聚氯乙烯、乙烯-乙酸乙烯共聚物、聚酰胺及其他橡塑材料并用改性的研究进展。     

甲基乙烯基硅橡胶/丁基橡胶硫化性能和耐热性能研究

通过共混法制备了甲基乙烯基硅橡胶/丁基橡胶复合材料,用DSC研究了复合材料硫化前的结晶性能与硫化性能,用TG研究了复合材料硫化后的热分解性能。根据在不同升温速率下的DSC曲线,用Kissinger方程对复合体系的硫化性能进行动力学研究,得到了交联反应活化能为95.1 kJ/mol、反应级数n为0.78。TG测试表明,复合材料的耐热性介于二者之间。力学测试表明,该材料的综合物理力学性能较好,可以作为阻尼材料使用。     

橡胶与塑料废弃物用于阻尼材料的新研究

总结了国内外废橡胶和废塑料在制造阻尼材料方面的研究和应用的成果。介绍了废橡胶作为减震降噪的阻尼材料在工程和工业中的研究应用,同时介绍了废胶粉与废塑料共混型阻尼材料、树脂型废胶粉阻尼材料的研究应用,指出废橡胶和废塑料制造阻尼材料用于生产实践,不仅可以起到减震降噪作用,而且能够节约资源,具有显著的环保效益,对于资源的可持续性发展具有重要意义。     

丁腈橡胶增韧环氧树脂研究进展

综述了近年来丁腈类橡胶增韧环氧树脂的研究进展,其中包括固体丁腈橡胶,液体丁腈橡胶(丁腈-40液体橡胶,无规端羧基液体丁腈橡胶(CRBN),端羧基液体丁腈橡胶(CTBN),改性端羟基丁腈橡胶(HTBN),改性端氨基液体丁腈橡胶(ATBN))以及改性液体丁腈橡胶与纳米SiO2共同增韧环氧树脂。     

Study on the high-temperature damping properties of silicone rubber modified by boron-terminated polysiloxane

Rubber damping materials have important applications in modern industrial systems. However, their damping temperature range is low, which is not suitable for the damping demand under high temperature conditions. At present, there is very little research on the damping performance of rubber under high temperature conditions. Silicone rubber has excellent high temperature resistance but poor damping in its application temperature range. In this study, a boron-terminated polysiloxane (PBS) was prepared by modifying hydroxy-terminated polydimethylsiloxane (PDMS-OH) with boric acid (BA). The molecular structure of PBS was confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC) analysis. Rheology measurements revealed that PBS was a “shear hardening” material. Then, the silicone rubber was modified with PBS. With the introduction of boron atoms, boron and oxygen dative bonds with dynamic properties could be formed inside the silicone rubber, which played an energy dissipation role in the process of association/dissociation. Dynamic mechanical analysis (DMA) showed that the loss factor (tan δ) of modified silicone rubber was greater than 0.3 in the temperature range of 81.5°C–250°C, which was higher than the loss temperature range of conventional damping rubber. The cyclic stress–strain test also showed that the modified silicone rubber still had high dissipation coefficient (DE) at high temperature. Therefore, the PBS-modified silicone rubber prepared by this method achieved excellent damping performance under high temperature conditions.     

Chlorinated butyl rubber/two-step modified montmorillonite nanocomposites: Mechanical and damping properties

Montmorillonite (MMT) was modified by ultrasound and castor oil quaternary ammonium salt intercalation method to prepare a new type of organic montmorillonite (OMMT). The surface structure, particle morphology, interlayer distance, and thermal behavior of the samples obtained were characterized. The modified OMMT was then added to chlorinated butyl rubber (CIIR) by mechanical blending, and a composite material with excellent damping properties was obtained. The mechanical experiment results of CIIR nanocomposites showed that the addition of OMMT improved their tensile strength, hardness, and stress relaxation rate. Compared with pure CIIR, when the content of OMMT was 5 phr (part per hundred of rubber), the tensile strength of the nanocomposite was increased by 677% and the elongation at break was also increased by 105.4%. The enhancement of this performance was mainly due to the dispersion of the nanosheets in CIIR rubber and the chemical interaction between the organoclay and the polymer matrix, which was confirmed by morphology and spectral analysis. OMMT also endowed a positive effect on the damping properties of CIIR nanocomposites. After adding 5 phr of OMMT, the nanocomposite owned the best damping performance, and the damping factor, tanδ_max, was 37.9% higher than that of pure CIIR. Therefore, the good damping and mechanical properties of these CIIR nanocomposites provided some novel and promising methods for preparing high-damping rubber in a wide temperature range.     

有机蒙脱土/丁基橡胶/聚丙烯热塑性硫化胶的制备与性能

采用动态硫化法制备了有机蒙脱土（OMMT）/丁基橡胶（IIR）/聚丙烯（PP）热塑性硫化胶（TPV）,考察了OMMT的用量和IIR/PP的质量比对TPV的物理机械性能、动态力学性能及热性能的影响。结果表明,当OMMT的用量为20份时,TPV的物理机械性能较佳,Payne效应最弱,OMMT均匀地分布在基体中,阻尼性能较好,有效阻尼温域较大。OMMT对PP的结晶行为有促进作用,OMMT加入量越多,复合体系的结晶温度越高。当IIR/PP的质量比为60/40时,Payne效应较弱,体系中IIR、PP及OMMT之间的相容性较好。