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研究不同并用比羧基丁腈胶乳(XNBRL)/羧基丁苯胶乳(XSBRL)并用胶膜的性能以及考察并用胶乳的相容性。结果表明:XNBRL/XSBRL的并用比为90/10时,XNBRL/XSBRL并用胶膜的t90最短,并用硫化胶膜的交联密度较大、拉伸强度最大(33.8 MPa)以及溶胀指数最小(2.10);XNBRL/XSBRL并用胶乳的粘度略大于XNBRL;随着XSBRL用量的增大,并用胶乳的机械稳定性变差,但变化幅度不大;XNBRL硫化胶膜和XNBRL/XSBRL并用硫化胶膜均仅有1个玻璃化温度,即XNBRL与XSBRL相容性很好,且XNBRL/XSBRL并用胶乳为均相体系;XNBRL/XSBRL并用硫化胶膜的XNBRL相与XSBRL相之间发生了化学键合,产生了共交联。 相似文献
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用电导滴定法和红外光谱分析法对三种羧基丁苯胶胶的羧基分布进行了研究。并且根据所得结果对胶乳的稳定性进行了分析。 相似文献
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羧基丁苯胶乳工业技术的工程开发 总被引:1,自引:0,他引:1
利用羧基丁苯胶乳中试和工业试验提出的聚合釜的放大规律和试验数据,以工业化为目标,分析了聚合釜的传热和脱气釜的放大问题,比较了20m3、30m3聚合釜放大的技术成熟性和两种结构不同的脱气釜的脱气性能。选择2台20m3聚合釜与2台50m3塔式脱气釜的匹配方案,完成了1万t/a羧基丁苯胶乳生产装置的基础设计。经工业化生产后,证明该工业技术的工程开发是成功的,产品质量达到了工业试验产品的水平. 相似文献
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油气田固井专用羧基丁苯胶乳的合成 总被引:1,自引:0,他引:1
以丁二烯、苯乙烯(St)为主要单体,引入不饱和羧酸、磺酸盐等作为功能性单体,采用复合乳化体系,以乳液聚合方式合成出油气田固井专用羧基丁苯胶乳。试验结果表明:最适宜的合成条件是w(复合乳化剂)=1.5%~2.0%、m(丁二烯)∶m(St)=(45~65)∶(55~35)、w(不饱和功能单体)=2.5%~3.5%(相对于总单体而言)、w(不饱和磺酸盐功能单体)=0.20%~1.00%、w(调节剂)=0.45%、m(烃)∶m(水)=100∶(120~130)、在(75±3)℃条件下聚合且w(过硫酸盐)=0.5%~0.6%;在最佳合成条件下制取的羧基丁苯胶乳,完全满足固井施工的要求。 相似文献
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通过评价试验,筛选出一种氧化还原引发剂作为脱气剂,基础研究对其组分配比、用量以及工艺条件等影响脱气的因素作了考察。经模型和中间试验证明,用该脱气剂0.5~1.5份,在脱气温度20~50℃下,经2.5~3.0h,可使羧基丁苯胶乳中残余苯乙烯含量由(528~13400)×10-6降至200×10-6以下,且不影响胶乳的性能,脱气效果亦不受脱气釜规模的影响。 相似文献
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A dielectric self-crosslinking hydrogenated carboxylated nitrile butadiene rubber (HXNBR) latex film was prepared by diimide reduction hydrogenation of XNBR latex and the doping of multi-walled carbon nanotube (MWCNT). The structures of the HXNBR and XNBR were characterised by Fourier transform infrared spectroscopy (FTIR) and 1HNMR, confirming the successful hydrogenation of XNBR. The mechanical, thermal, and electrical properties of the prepared HXNBR latex films were studied, and the HXNBR latex film reinforced by only 3?phr MWCNTs exhibited improved mechanical, thermal, and dielectric properties. 相似文献
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试验发现:一种阴离子型兼具非离子性的乳化剂A用于羧基丁苯胶乳聚合体系,可显著提高胶乳的质量,其质量分数即使下降到原配方乳化剂标准用量的25%,也能制备出合格的胶乳;与使用SDS的聚合体系相比,使用乳化剂A的聚合体系的聚合反应及产物质量重复性好,胶乳的钙离子稳定性显著提高。分析发现,乳化剂用量的大小会导致聚合反应机理的差异,从而影响聚合反应及产物质量;在酸性条件下,乳化剂本 身的稳定性也是造成这种差异的原因之一。应用试验结果表明:用乳化剂A代替SDS并在一定范围内改变其用量,不会影响胶乳的应用性能。 相似文献
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丁苯道路胶乳工业试生产 总被引:1,自引:0,他引:1
用减粘剂法釜式(卧式蒸发器)外循环加热真察觉有缩工艺生产了固体物质量分数为45%的道路胶乳,工业试生产表明,适宜的操作条件为:温度70~75℃,真空度-0.085MPa,脱水量380~500L/h,胡阒浓缩过程中碱性助剂的加入,产品胶乳的pH值比原料胶乳的高出0.4~2.0,减粘剂的加入速度过快会使胶乳产生絮凝,造成设备堵挂,而且使产品色相呈灰白色,碱性助剂的加料时间以不少于1h为宜,减粘剂的加入量为胶乳总固体物质量的1.3%。 相似文献
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Polybutadiene latex (PBL) was agglomerated by highly carboxylated core-shell agglomerating agents, which contained carboxyl groups in the shell polymer [core monomers (methyl methacrylate, n-butyl acrylate, and ethyl acrylate)/shell monomer (acrylic acid)]. The effects of different parameters upon the particle size of agglomerated PBL were investigated, namely, agglomeration time, amount of agglomerating agent, pH of dispersion medium, amount of acrylic acid and combination of core monomers. The particle growth mechanism was also examined. © 1999 Society of Chemical Industry 相似文献
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The mechanism and the optimum conditions for the reduction of residual double bonds in styrene-butadiene rubber (SBR) latex by hydrogenating the polybutadiene in the latex form were studied. The hydrogenation involves a copper ion (II)-catalyzed procedure in which diimide hydrogenation agent is generated in situ at the surfaces of latex particles by a hydrazine/hydrogen peroxide redox system. The surface density of the copper ion in particle surfaces was found to be a crucially important parameter in controlling the degree of hydrogenation. The distribution of the double bonds in the latex particles after the hydrogenation was found to be dependent on the particle size and the extent of crosslinking in the particles. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2047–2056, 1997 相似文献
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The paper deals with the influence of water-to-cement ratio (W/C) and percentage of polymer in the setting time, rheology and physical and mechanical properties of a Styrene-Butadiene-Rubber (SBR) Latex Modified Mortar (LMM).An experimental test program including setting time and consistency in the fresh state and porosity, density, ultrasonic modulus and compressive and flexural strength in the hardened state of a LMM at different ages was performed. Several W/C and percentages of latex were studied.The results obtained showed that both parameters interact in the properties in the fresh and the hardened states of the LMM. Multiple linear correlations among dosage parameters and physical and mechanical variables are presented. Linear approximations are acceptable (95% confidence level), taking into account the nature of the LMM.Some dynamic compression tests were accomplished in order to determine some dynamic properties of SBR Latex Modified Mortar, as dynamic modulus (E0) and loss tangent (tan δ). 相似文献
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