TỔNG HỢP CAO SU THIÊN NHIÊN LỎNG CÓ NHÓM HYDROXYL CUỐI MẠCH BẰNG PHƯƠNG PHÁP FENTON QUANG HOÁ 1. NGHIÊN CỨU ẢNH HƯỞNG CỦA CÁC ĐIỀU KIỆN PHẢN ỨNG FENTON QUANG HOÁ

Abstract

SUMMARY

Some reaction conditions of the Photo Fenton process to prepare hydroxyl-terminated liquid natural rubber (LNR-OH), such as pH, H₂O₂/Fe²⁺ ratio, reaction time, reaction temperature, initial concentration of natural rubber (NR)  have been investigated in detail. It was shown that at pH ~ 3,  H₂O₂/Fe²⁺ ratio ~ 1,5, concentration of NR ~ 5%, T ~ 35 ^oC the Photo Fenton process took place the best resulting in the formation of LNRs-OH, that have M_v ~ 4,500 and 3,800 after  80 h and 100 h, respectively.

Keywords. liquid natural rubbers, Fenton reaction, hydroxyl-terminated liquid natural rubbers