共查询到19条相似文献,搜索用时 109 毫秒
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用RTV585硅橡胶、填料及固化剂60R制成了绝热涂料;考察了填料种类及用量对绝热涂料绝热性能、力学性能和粘接性能的影响及金属表面处理方式对金属与涂料的粘接性能的影响。结果表明,当RTV585用量为100g、固化剂60R用量为2g、软木粉用量为20g时,可制得绝热性能良好的涂料;采用喷砂 清洗 偶联剂的表面处理模式,可大大提高涂料与金属的粘接性能。 相似文献
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本文首先采用液相化学还原法,用抗坏血酸作还原剂或葡萄糖作预还原则,制备了粒径分布范围较窄的超细铜粉,并讨论了以改性超细铜粉为导电填料在导电涂料中的应用。着重研究了影响铜粉导电涂料导电性能的多种因素,例如涂料的固化温度、铜粉含量、固化剂用量等对导电涂料导电性能的影响。 相似文献
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Copper particles/epoxy resin thermosetting conductive adhesive using polyamide resin as curing agent
Thermosetting conductive adhesive (TCA) comprised of epoxy resin E‐51 as matrix, Cu microparticles and nanoparticles modified by silane coupling KH550 as conductive fillers, polyamide resin with low molecular weight as curing agent, and some other additives. It was reported creatively a new liquid curing agent, which solved successfully some difficult problems during preparation of TCA, such as limit of quantity of conductive fillers. Therefore, application of this liquid curing agent decreased greatly the resistivity of TCA under the condition of keeping enough adhesion strength. Antioxidized and mixed Cu particles were developed as conductive fillers in place of expensive Ag. The results showed that optimum conditions of conductive adhesive composed of 16 wt % of epoxy resin E‐51, 8 wt % polyamide resin, 65 wt % of Cu microparticles and nanoparticles, 1.3 wt % of silane coupling agent, and 9 wt % of other additives with curing time for 4 h at 60°C. The adhesion strength reached 16.7 MPa and the bulk resistivity was lower than 3.7 × 10?4 Ω cm. The variation of bulk resistivity was less than 15% at high temperature (100°C). © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 相似文献
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以硼酸、异丙醇和十八醇为主要原料,催化剂是采用DNW-1强酸性离子交换树脂,在氮气保护下合成了硼酸酯偶联剂。考察了带水剂及物料摩尔比对酯化率的影响,并用红外光谱和1H NMR对硼酸酯进行了表征。研究发现:在n(硼酸)∶n(十八醇)∶n(异丙醇)=0.9∶2.0∶1.2的条件下,并采用苯和甲苯混合带水剂时,酯化率可达到94.57%。利用所合成的硼酸酯偶联剂应用于水镁石/HDPE复合体系中,结果表明:改性水镁石/HDPE体系的拉伸强度高于未改性水镁石/HDPE体系的拉伸强度。添加量为50%时,改性水镁石的拉伸性能比未改性前提高了3.1%,LOI值为24.5。 相似文献
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应用新型高效原油脱钙剂,作脱钙试验,脱钙率达到61%以上,镁脱除率70%以上。新型原油脱钙剂脱钙效果高于传统磷系脱钙剂脱钙效率一倍以上。 相似文献
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纳米氧化锌是一种高性能的无机材料,由于活性高,必须对其进行表面改性。本文通过对不同量钛酸酯偶联剂改性的纳米氧化锌活化指数的测定,得到常温下改性纳米氧化锌的钛酸酯偶联剂的最佳用量,并且探讨改性机理及最佳用量原因。 相似文献
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