DRS/SDS/NF体系中合成聚丁二烯胶乳的表观反应速率的研究

APPARENT POLYMERIZATION RATE OF POLYBUTADIENE LATEX SYNTHESIS IN SYSTEM OF DRS/SDS/NF EMULSIFIER

在以岐化松香皂（ＤＲＳ）、十二烷基硫酸钠（ＳＤＳ）和间次甲基萘磺酸盐（ＮＦ）组成三元复合乳化剂体系中，研究了丁二烯（Ｂｄ）中炔烃、二聚体（Ｄｉ）、ＤＲＳ中的松香酸（ＲＡ），水相中的碳酸盐（Ｃａ）浓度及３种乳化剂复合比对ＡＢＳ用聚丁二烯胶乳（ＰＢＬ）的表观反应速率（Ｒｐ）的影响。结果表明，炔烃和Ｄｉ存在使Ｒｐ降低，其中乙烯基乙炔（ＶＡ）影响较（Ｐｒ）大；松香酸含量达４％时，Ｒｐ降低了５０％；５０℃、６０℃和６６℃３段阶梯温度有利于Ｒｐ提高，且凝聚物及微观结构保持在一较好水平；水相中Ｃａ浓度＜１．２％时，Ｒｐ增加，反之Ｒｐ呈线性降低；ＳＤＳ／ＤＲＳ＜０．２，Ｒｐ随ＳＤＳ／ＤＲＳ增大而提高，ＮＦ／ＤＲＳ＞０．１，对Ｒｐ无影响，但可以较好地改善ＰＢＬ稳定性。

Effect of vinyl acetylene(VA), propyne(Pr), dimer(Di), rosin acid(RA), ladder temperature, carbonate(Ca), sodium dodecyl sulphate(SDS), sodium naphthalene sulfonate(NF) and disproportional rosin soap(DRS) on polymerization rate( R p) etc. were studied. The results show that content of VA, Pr, Di and RA decreases significantly R p. Ladder temperature composed of 50 ℃, 60 ℃ and 66 ℃ improves R p and coagulum. When Ca concentration was more than 1.2%, R p was decreased in linearity. R p was increased with the increase SDS and DRS ratio under condition that SDS/DRS was less than 0.2。 NF and DRS ratio meets the condition of 0.1 and more R p wasnt affected.