粉末氯丁橡胶-244的制备及与块状氯丁橡胶的比较  

Preparation of powdered polychloroprene rubber-244 and comparison with lump polychloroprene rubber

作　　者：魏绪玲 龚光碧 高阳光 郑聚成 赵志超 梁滔 白竞冰 艾纯金 

机构地区：[1]中国石油兰州化工研究中心,甘肃兰州730060

出　　处：《合成橡胶工业》2011年第2期95-98,共4页China Synthetic Rubber Industry

基　　金：中国石油石油化工研究院资助项目(CHS/QR13-03)

摘　　要：以氯丁胶乳为原料,采用直接凝聚法制备粉末氯丁橡胶(PCR-244),研究了体系pH值、凝聚剂和隔离剂用量、凝聚温度、搅拌转速对PCR-244凝聚效果的影响,并与块状氯丁橡胶进行了对比。结果表明,在体系pH值为11～13、凝聚剂和隔离剂用量分别为20份和10～15份以及凝聚温度为20～25℃、搅拌转速为80～100 r/min的条件下,能得到平均粒径小于0.80 mm、成粉率达100%的PCR。相同条件下,PCR比块状氯丁橡胶的溶解速率大大提高,但二者溶解后的溶液黏度和剥离强度相近。PCR-244仅仅改变了氯丁橡胶的形态,其内部主要结构与块状氯丁橡胶相似。The powdered polychloroprene rubber （PCR-244） was prepared by direct coacervation with neoprene latex as material. The effects of pH value, the amount of coagulant and antiadhesion agent, the eoacervation temperature, stirring speed on the powdering were investigated, and the comparison was carried out with lump polychloroprene rubber （CR-244）. The results showed that PCR of the diameter less than 0.80 mm and powder ratio of 100% could be obtained when pH value was 11 -13 in the system, the amounts of coagulant and antiadhesion agent were 20 phr and 10 - 15 phr respectively, coacervation temperature was 20 - 25 ℃ , stirring speed was 80 - 100 r/min. Under the same conditions, the dissolution rate of PCR-244 increased greatly, while solution viscosity and peeling strength were similar compared with lump CR-244. So the preparation processs of PCR-244 only changed the geometric form of the latter, but not changed its main internal structure.

关 键 词：粉末氯丁橡胶 直接凝聚法 成粉率 平均粒径 块状氯丁橡胶 

分 类 号：TQ333.5[化学工程—橡胶工业]