cavitation threshold meaning in Chinese

空化阈

Increasing ultrasound intensity in the range of cavitation threshold and cavitation peak value , decreasing monomer concentration and increasing the temperature make the induction period shorter . under optimized reaction conditions , the conversion of ba can reach 90 % in 11 min at high n2 flow rate the viscosity average molecular weight of the obtained pba reaches 5 . 24 106 . the molecular weight of pba varies with ultrasonic irradiation time , indicating that the ultrasonic induced emulsion polymerization is dynamic and quite complicated , polymerization of monomer as well as degradation of polymer occurs concomitantly
一、实现了无常规化学引发剂存在下的超声辐照引发丙烯酸正丁酯( ba )间歇乳液聚合，制备了pba纳米粒子，在11min内转化率达到90 ，分子量达5 . 24 10 ~ 6 ，随反应时间的延长而降低，表明超声辐照引发乳液聚合是一个动态的复杂过程，单体的聚合和聚合物的降解同时发生。