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胶乳附聚法放大聚丁二烯胶乳粒径的进展 总被引:6,自引:0,他引:6
在介绍功能胶乳粒子放大技术基础上,着重叙述用聚丙烯酸酯乳液附聚丁二烯类胶乳制备大粒径的功能乳液的方法。采用胶乳附聚法新工艺有利于提高ABS等树脂市场竞争力和功能胶乳商品化。 相似文献
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用丙烯酸正丁酯(BA)和甲基丙烯酸(MAA)合成了高分子附聚剂,并制备了大粒径聚丁二烯胶乳(PBL)。研究了PBL含量(在规定条件下烘干后剩余部分占总量的质量分数)、附聚剂用量和附聚剂中MAA含量对附聚效果的影响。结果表明:当PBL质量分数为30.0%、附聚剂质量分数为2.5%~3.0%、附聚剂中MAA质量分数为15.0%时,可制得粒径大于300 nm、粒径分布为单峰的稳定PBL。 相似文献
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采用高分子附聚法和醋酸附聚法获得了大粒径聚丁二烯胶乳(PBL),然后与丙烯腈(AN)和苯乙烯(St)发生乳液接枝聚合反应,制得了丙烯腈-丁二烯-苯乙烯共聚物(ABS)高胶粉。将ABS高胶粉与丙烯腈-苯乙烯共聚物(SAN)共混挤出,制得了ABS树脂。研究了2种附聚法对PBL的粒子形态、粒径大小、粒径分布指数以及ABS树脂性能的影响。结果表明:与醋酸附聚法PBL相比,高分子附聚法PBL的粒径分布指数更大,普遍大于0.10,粒径均一性更差,且存在团聚现象;高分子附聚法PBL接枝后出现黏结现象;由高分子附聚法PBL所得ABS样条断面无明显的“海-岛”结构,抗冲击性能普遍较差。 相似文献
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本文研究了一种胶乳对另一种胶乳的附聚作用。研究了附聚过程的基本规律,发现存在两个附聚峰。在水溶性大分子附聚胶乳机理的基础上,探讨了附聚胶乳附聚作用的机理。 相似文献
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采用丙烯酸(AA)、丙烯酸丁酯(BA)混合单体通过乳液聚合方法合成附聚剂,用于聚丁二烯胶乳(PBL)的附聚.研究了附聚时间、附聚剂组成、附聚剂加入量、附聚剂的粒子尺寸等因素对聚丁二烯(PB)胶乳粒径大小的影响.结果表明:附聚时间为40~60 min时,附聚过程基本完成;当BA/AA质量比为80/20时,附聚效果最好;附聚剂在PBL中加入量占PBL总质量的8.3%时,附聚效果明显;PBL平均粒径由原来的96nm附聚到了240~260 nm,粒径得到了明显的增长,合成的附聚剂有良好的附聚效果. 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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以丙烯酸酯类共聚物乳液作为聚合物乳液附聚剂,采用在线静态混合器对粒径为100.5 nm的小粒径聚丁二烯胶乳(PBL)进行附聚,并与采用传统附聚器间歇附聚法PBL进行了对比,对用2种方法获得的丙烯腈-丁二烯-苯乙烯(ABS)树脂的性能进行了比较。结果表明,采用静态混合器在线附聚法,可得到粒径呈双峰分布、有效粒径为298.3 nm、多分散性指数为0.316的大粒径PBL;而在同样条件下采用附聚器间歇附聚法,所得PBL粒径也呈双峰分布,有效粒径为268.4 nm,多分散性指数为0.359,可见静态混合器在线附聚效果好于附聚器间歇附聚法。采用静态混合器在线附聚法获得的ABS树脂,其抗冲击性能优于附聚器间歇附聚法ABS树脂。 相似文献
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介绍了羧基丁苯胶乳生产过程中的废水情况和污水处理方法,对污水进行实验研究,提出了含胶乳污水处理的新方法。通过实验研究,确定处理胶乳污水的最佳方案为:n(CaCl2):n(CaO)为2:1,PAM加量为1.0mg/L。经过混凝处理后水质pH=9,COD:330mg/L,BOD:78mg/L,石油类:3.50mg/L,SS:72mg/L,氯离子:785mg/L,达到GB8978—96污水排放三级标准要求,也符合进污水处理场要求。 相似文献
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An ambient curable isocyanate functional acrylic latex was synthesized by incorporating dimethyl meta-isopropenyl benzyl isocyanate (TMI®), an isocyanate monomer, into styrene/n-butyl acrylate copolymer. An artificial latex of amino-terminated telechelic polybutadiene was prepared and blended with the acrylic latex as a curing agent. The isocyanate content in the blended latex was determined by titration and FTIR measurements. The latex blend properties, in terms of particle size and latex viscosity, and the latex film properties, in terms of stress–strain behavior and solvent swelling behavior, showed no significant change after 30 days' storage of the latex blend at 50°C. The good storage stability was attributed to the stable nature of the latex blend in which there was little chance for the isocyanate-containing particles to come into contact with the curing agent particles, thus preventing premature contact of the acrylic chains with the telechelic chains. The reactivity of different functional groups in the telechelic polymer was studied; the amino group was found to be the most reactive toward the TMI. In addition, a shorter chain telechelic crosslinker was found to result in a higher degree of crosslinking, but this was more intraparticle than interparticle in nature. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 965–975, 1998 相似文献