羧基丁苯胶乳的合成

简要介绍羧基丁苯胶乳发展概况及合成工艺，并探讨了影响羧基丁苯胶乳的聚合反应及羧基分布的诸因素。     

造纸用羧基丁苯胶乳的稳定性

用Ｕ形管电泳仪在电压为３０Ｖ条件下测定了造纸用羧基丁苯胶乳（牌号ＸＳＢＲＬ４６Ｃ）的ξ电位；研究了十二烷基硫酸钠（ＳＤＳ）、十二烷基苯磺酸钠（ＳＤＢＳ）、电解质溶液的浓度及ｐＨ值对ξ电位及稳定性的影响。结果表明：ＳＤＳ和ＳＤＢＳ的浓度超过临界胶束浓度后，ξ电位增值减小；当乳液ｐＨ值小于７或大于９时，ξ电位减小，乳液稳定性降低。     

板纸专用羧基丁苯胶乳的合成

通过实验研究了新的乳化体系并引进功能单体,在乳化体系上进行彻底地改进,合成出一种性能优越的板纸专用羧基丁苯胶乳,从而达到在质量上缩小国产胶乳与国外胶乳的差距的目的。     

板纸专用羧基丁苯胶乳的合成

通过实验研究了新的乳化体系并引进功能单体,在乳化体系上进行彻底地改进,合成出一种性能优越的板纸专用羧基丁苯胶乳,从而达到在质量上缩小国产胶乳与国外胶乳的差距的目的.     

羧基丁苯胶乳的羧基分布研究

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。     

造纸用新型羧基丁苯胶乳的开发与应用

介绍了新型羧基丁苯胶乳的开发与应用,乳化剂的复配及搅拌转速对胶乳生产的影响,并通过对比验证了该产品的优良性能。     

应用新的乳化体系合成板纸专用羧基丁苯胶乳

通过研究新的乳化体系,合成出一种性能优越的板纸专用羧基丁苯胶乳,并通过应用试验验证了该胶乳的优良性能。     

Multi-walled carbon nanotube reinforced self-crosslinking hydrogenated carboxylated nitrile butadiene rubber latex film with improved properties

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.     

氢化羧基丁苯橡胶氢化度的测定

用水合肼/双氧水/硫酸亚铁催化体系对羧基丁苯橡胶（XSBR）胶乳加氢,制备氢化羧基丁苯橡胶（HXSBR）。探讨了用碘量法测定XSBR不饱和度和HXSBR氢化度的条件,得到了以庚醇与四氯化碳的混合试剂[V（庚醇）：V（四氯化碳）=0.12:1]为溶剂,反应时间为1.5h,温度为40-45℃的碘量法可以较好地测定HXSBR氢化度,并用溶度参数相近规则选择并解释所用溶剂。     

天然胶乳/羧基丁苯胶乳共混制自黏胶乳

在天然胶乳中加入防老剂A和防老剂D及羧基丁苯胶乳(丙烯酸酯压敏胶乳或丙烯酸酯共聚乳液)等,制备了自黏胶乳。结果表明,使用质量分数为1．2％的防老剂A与D的复合防老剂,天然胶乳剥离强度的保持效果较好;添加砂磨轻质CaCO3对天然胶乳自黏性影响较大;将不同牌号的羧基丁苯胶乳与天然胶乳并用,TR-258效果较好,能部分取代天然胶乳,而TR～163和TR-376因自固化作用强．对试样自黏性产生了不利影响。     

Thermal degradation and ageing behavior of microcomposites of natural rubber,carboxylated styrene butadiene rubber latices,and their blends

The effect of microfillers on the thermal stability of natural rubber (NR), carboxylated styrene butadiene rubber (XSBR) latices, and their 70/30 NR/XSBR blend were studied using thermogravimetric method. Microcomposites of XSBR and their blend were found to be thermally more stable than unfilled samples. The activation energy needed for the degradation of polymer chain was calculated from Coats‐Redfern plot. Activation energy needed for the thermal degradation of filled samples was higher than unfilled system. It indicated the improved thermal stability of the filled samples. The ageing resistance of the micro‐filled samples was evaluated from the mechanical properties of aged samples. The thermal ageing was carried out by keeping the samples in hot air oven for 7 days at 70°C. The mechanical properties such as tensile strength, modulus at 300% elongation, and strain at break were computed. As compared to unfilled samples, micron‐sized fillers reinforced systems exhibited higher ageing resistance. Finally, an investigation was made on the influence of ion‐beam irradiation on microcomposites of NR, XSBR latices, and their 70/30 blend systems using ²⁸Si⁸⁺ performed at 100 MeV. The surface changes of the samples after irradiation were analyzed using X‐ray photoelectron spectroscopy. The results of XPS measurements revealed that the host elements were redistributed without any change in binding energies of C_1s, O_1s, and Si_2p. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

羧基偏氯乙烯丁苯胶乳粒子的相态结构和应用性能

以过硫酸铵为引发剂，十二烷基硫酸钠为乳化剂，采用种子聚合工艺，合成了偏氯乙烯质量分数为２３％～４３％的羧基偏氯乙烯丁苯胶乳。通过电镜观察到所合成的胶乳粒子具有核－壳结构。通过测定胶闰子表面层的羧基数量，研究了羧基的分布，结果表明，羧酸种类对羧基在胶乳粒子中及在聚合体系中的分布有重要影响，该胶乳作为地毯背衬粘合剂，具有粘合力高，极限氧指数高的特点，是一种较好的阻燃性粘合剂。     

Natural rubber–styrene butadiene rubber latex blends: Time-dependent rheological behavior and film formation

This article focuses mainly on the effect of maturation time on the rheological behavior of unvulcanized natural rubber (NR)–styrene butadiene rubber (SBR) latex blends. Viscosity shows a composition-dependent behavior with maturation time. It was found that there is a marginal decrease in viscosity for all the systems with maturation time except for the 70/30 NR–SBR blend. In this blend, there is a sharp decrease in viscosity with maturation time. This is associated with the exchange of stabilizers with one another until an equilibrium is reached; that is, all the particles of the blend are stabilized with random mixture of stabilizers. The structural build up observed in 70/30 NR–SBR blend was found to be diminished as the maturation time increases. At equilibrium, there is no further exchange of stabilizers. The behavior of this blend has been explained with the help of a schematic model. The effects of blend ratio and surface active agents on the viscosity were also studied. In addition, the time-dependent flow behavior of prevulcanized latex blends was evaluated as a function of vulcanizing systems and prevulcanization time. There is a regular increase in viscosity with prevulcanization time. However, after 3 h, the viscosity of almost all blends levels off, indicating that the curing reaction is complete within this time. Finally, the morphological changes occurred during film formation of the blends were studied using scanning electron microscopy. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1473–1483, 1998     

改性Kevlar纳米纤维对羧基丁腈橡胶/丁苯橡胶共混胶力学性能的影响

采用环氧氯丙烷对Kevlar纳米纤维(KNFs)表面进行改性,制备了表面改性KNFs(m-KNFs),考察了m-KNFs对羧基丁腈橡胶(XNBR)/丁苯橡胶(SBR)共混胶力学性能的影响.结果表明,m-KNFs可以增强XNBR/SBR共混胶的拉伸性能及撕裂性能,提高硫化胶的热稳定性和耐溶剂性能.添加5份m-KNFs后,...     

影响ABS树脂用EBR胶乳粒径的因素

考察了影响ABS树脂用乳液聚丁二烯橡胶（EBR）胶乳粒径的诸因素，包括初乳化剂用量、补加乳化剂用量、电解质用量、引发剂用量、初水配比及聚合温度等，得到了影响胶乳粒径各因素的线性关系。结果表明，影响EBR胶乳粒径的主要因素为初乳化剂、补加乳化剂及电解质用量，工业生产中应通过调节这些因素来实现不同EBR胶乳的生产。     

胶乳的作用及对纸张涂料性能的影响

胶乳加到高岭土悬浮液中能瓦解片状高岭土的聚集 ,提高了涂料的多分散性 ,同时增加了涂料的稳定性。胶乳在涂料中起到粘接颜料粒子及颜料与纸基的作用 ,增强涂层强度。胶乳的粒径和形状、胶乳的稳定性及玻璃化温度等特性影响涂料粘度、流变性等性能。在预涂涂布中 ,选择由高苯乙烯含量聚合的羧基丁苯胶乳可提高涂层抗拉毛强度及纸面光泽度和平滑度 ,有利于面涂涂布     

羧基丁苯吡胶乳的技术进展

介绍了羧基丁苯吡胶乳的特性,聚合和浸胶技术的进展及其与聚酯帘线的作用机理