• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Modeling and measurement of micromixing effects on bulk copolymerization in a stirred tank reactor.
【24h】

Modeling and measurement of micromixing effects on bulk copolymerization in a stirred tank reactor.

机译：在搅拌釜反应器中微混合对本体共聚作用的建模和测量。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Micromixing problem is particularly well known in bulk copolymerization. This affects the product qualities. Therefore, in the present work, micromixing effects on styrene-methyl methacrylate, free-radical, bulk copolymerization were studied using a stirred tank reactor.Copolymer composition distributions have long been proposed for measuring micromixing effects. However, the necessary analytical techniques have been found difficult and ambiguous. The reason is interference between molecular weight, sequence length and composition distributions. Hence, first a technique for measuring copolymer composition distribution was developed. A high conversion, methyl-methacrylate copolymer was prepared in batch at 60Mixing experiments were conducted by copolymerizing these monomers in a laboratory scale reactor. Agitation was provided by a four-blade, 45The measured composition distributions of the coploymers were sharp and close to the statistical composition distributions. The average compositions, calcuated from the measured distributions, agreed well with those measured by Using the Atiqullah-Nauman model, the segregation effect was quantified by segregation number. From this an upper limit of the initial striation thickness was calculated. This limit was approximately 1 mm for the present system.
机译：在本体共聚中微混合问题是特别众所周知的。这会影响产品质量。因此，在目前的工作中，使用搅拌釜反应器研究了苯乙烯-甲基丙烯酸甲酯的自由基，本体共聚的微观混合效应。长期以来，人们一直在提出共聚物的分布来测量微观混合效应。然而，已经发现必要的分析技术是困难且模棱两可的。原因是分子量，序列长度和组成分布之间存在干扰。因此，首先开发了一种用于测量共聚物组成分布的技术。在60℃下分批制备高转化率的甲基丙烯酸甲酯共​​聚物。通过在实验室规模的反应器中使这些单体共聚来进行混合实验。由四叶片45提供搅拌。测得的共聚体组成分布清晰且接近统计组成分布。从测得的分布计算出的平均组成与通过使用Atiqullah-Nauman模型测得的平均组成非常吻合，偏析效果通过偏析数来量化。由此计算出初始条纹厚度的上限。对于本系统，该极限约为1mm。

著录项

  • 作者

    Atiqullah, Muhammad.;

  • 作者单位

    Rensselaer Polytechnic Institute.;

  • 授予单位 Rensselaer Polytechnic Institute.;
  • 学科 Chemistry Pharmaceutical.Engineering Chemical.
  • 学位 Ph.D.
  • 年度 1988
  • 页码 184 p.
  • 总页数 184
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号