The investigation of optimum condition of natural rubber epoxidation reaction in latex phase

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-07-01 DOI:10.20543/MKKP.V37I1.6069

N. A. Kinasih, H. Handayani, M. I. Fathurrohman, A. F. Falaah

{"title":"The investigation of optimum condition of natural rubber epoxidation reaction in latex phase","authors":"N. A. Kinasih, H. Handayani, M. I. Fathurrohman, A. F. Falaah","doi":"10.20543/MKKP.V37I1.6069","DOIUrl":null,"url":null,"abstract":"Natural rubber (NR) latex epoxidation is a chemical modifcation of natural rubber to produce natural rubber with higher polarity (oil resistant) which is commonly called epoxidized natural rubber (ENR). ENR is produced from the reaction of natural rubber latex with performic acid. Performic acid is formed from in situ reaction between formic acid and hydrogen peroxide. During epoxidation process, the carboxyl group of natural rubber is converted into epoxy group and various side reaction products such as carbonyl, hydroxyl, and hydro furan. These side products must be minimalized to optimize the epoxy level. The epoxidation reaction was carried out at 70 ° C for 6 hours using 2 types of latex: fresh latex (FL) and concentrated latex (CL). The addition of reactant was varied in two ways: dropwise (coded “1”) and poured all at once (coded “2”). The epoxy product and rate constant (k) were analyzed to obtain optimum reaction condition. The epoxy and side reaction content were determined by Attenuated Resonance Fourier Transform Infrared (ATR-FTIR). The slope of epoxy-time plotting curve was determined as ENR rate constant (k). The optimum NR epoxidation reaction was achieved in CL2, which exhibited lowest value of side reaction and highest value of k (2.8082x10 -5 L mol -1 sec -1 ).","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Majalah Kulit, Karet, dan Plastik","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.20543/MKKP.V37I1.6069","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Natural rubber (NR) latex epoxidation is a chemical modifcation of natural rubber to produce natural rubber with higher polarity (oil resistant) which is commonly called epoxidized natural rubber (ENR). ENR is produced from the reaction of natural rubber latex with performic acid. Performic acid is formed from in situ reaction between formic acid and hydrogen peroxide. During epoxidation process, the carboxyl group of natural rubber is converted into epoxy group and various side reaction products such as carbonyl, hydroxyl, and hydro furan. These side products must be minimalized to optimize the epoxy level. The epoxidation reaction was carried out at 70 ° C for 6 hours using 2 types of latex: fresh latex (FL) and concentrated latex (CL). The addition of reactant was varied in two ways: dropwise (coded “1”) and poured all at once (coded “2”). The epoxy product and rate constant (k) were analyzed to obtain optimum reaction condition. The epoxy and side reaction content were determined by Attenuated Resonance Fourier Transform Infrared (ATR-FTIR). The slope of epoxy-time plotting curve was determined as ENR rate constant (k). The optimum NR epoxidation reaction was achieved in CL2, which exhibited lowest value of side reaction and highest value of k (2.8082x10 -5 L mol -1 sec -1 ).

查看原文本刊更多论文

天然橡胶在乳胶相中环氧化反应最佳条件的探讨

天然橡胶（NR）胶乳环氧化是对天然橡胶进行化学改性，生产出极性更高（耐油）的天然橡胶，通常称为环氧化天然橡胶（ENR）。ENR是由天然橡胶胶乳与过孔酸反应生成的。穿孔酸是由甲酸和过氧化氢之间的原位反应形成的。在环氧化过程中，天然橡胶的羧基转化为环氧基和各种副反应产物，如羰基、羟基和四氢呋喃。这些副产品必须最小化，以优化环氧树脂水平。环氧化反应在70°C下进行6小时，使用2种类型的胶乳：新鲜胶乳（FL）和浓缩胶乳（CL）。反应物的添加有两种方式：逐滴（编码“1”）和一次性倾倒（编码“2”）。通过对环氧树脂产物和速率常数（k）的分析，确定了最佳反应条件。用衰减共振傅立叶变换红外光谱（ATR-FTIR）测定环氧树脂和副反应的含量。环氧树脂时间绘制曲线的斜率被确定为ENR速率常数（k）。最佳NR环氧化反应是在CL2中进行的，其副反应值最低，k值最高（2.8082x10-5 L mol-1 sec-1）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Majalah Kulit, Karet, dan Plastik

自引率

0.00%

发文量

审稿时长

16 weeks