| Fe2+-H2O2-二氧化硫脲引发桉木浆与甲基丙烯酸缩水甘油酯接枝共聚的研究 |
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| 引用本文： | 黄军,翟华敏.Fe2+-H2O2-二氧化硫脲引发桉木浆与甲基丙烯酸缩水甘油酯接枝共聚的研究[J].林产化学与工业,2008,28(2):58-62. |
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| 作者姓名： | 黄军 翟华敏 |
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| 作者单位： | 南京林业大学,江苏省制浆造纸科学与技术重点实验室,江苏,南京,210037 |
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| 基金项目： | 江苏省研究生培养创新工程项目 |
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| 摘 要： | 研究了Fe2 -H2O2-二氧化硫脲体系引发桉木浆与甲基丙烯酸缩水甘油酯(GMA)的接枝共聚.初步讨论了该引发体系的引发机理,用接枝率、接枝效率和单体转化率考察了温度、反应时间、过氧化氢用量、二氧化硫脲用量、单体浓度和液比对接枝的影响.并用红外光谱对接枝纤维产物进行了鉴定.结果表明,组分二氧化硫脲的加入能有效地使接枝共聚得以顺利进行.适当提高温度,增加过氧化氢用量,减小液比,控制合适的二氧化硫脲用量都能提高接枝率和单体转化率,并在较短的时间就能成功接枝.接枝效率几乎不受任何因素的影响,一般维持在97%～99%,接枝过程产生的均聚物极少.
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| 关 键 词： | Fe2 -H2O2-二氧化硫脲 桉木浆 甲基丙烯酸缩水甘油酯 接枝共聚 |
| 文章编号： | 0253-2417(2008)02-0058-05 |
| 修稿时间： | 2007年5月29日 |
Graft Copolymerization of Glycidyl Methacrylate with Eucalyptus Pulp Induced by Fe2+-H2O2-thioureadioxide Redox System |
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| HUANG Jun,ZHAI Hua-min.Graft Copolymerization of Glycidyl Methacrylate with Eucalyptus Pulp Induced by Fe2+-H2O2-thioureadioxide Redox System[J].Chemistry & Industry of Forest Products,2008,28(2):58-62. |
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| Authors: | HUANG Jun ZHAI Hua-min |
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| Abstract: | Graft copolymerization of bleached eucalyptus pulp with glycidyl methacrylate(GMA)induced by Fe2 -H2O2-thioureadioxide redox system was studied in detail.The mechanism of this initiator system was discussed primarily;the effects of reaction temperature and time,hydrogen peroxide and thioureadioxide dosages,monomer concentration and liquor ratio were characterized by the grafting rate,grafting efficiency and monomer conversion,and the chemical structure of grafted fiber was identified by FT-IR.Results showed that the addition of thioureadioxide can help to produce more radicals,which react with cellulose to obtain cellulose macromolecule radicals and thus proceed the graft copolymerization successfully.Proper increases of temperature,hydrogen peroxide dosage,proper decrease of liquor ratio and proper maintaining of thioureadioxide dosage are beneficial to the grafting rate and monomer conversion.Graft copolymerization can be proceeded successfully in a short time.Grafting efficiency could be generally maintained at 97 % to 99 %,and was almost not affected by any factor.Extremely insignificant amount of homopolymer was produced during the grafting process. |
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| Keywords: | Fe2 -H2O2-thioureadioxide eucalyptus wood pulp glycidyl methacrylate graft copolymerization |
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