首页> 外文期刊>Journal of Applied Polymer Science >Study on Syntheses and Properties of 2,2'-Mercaptoethylsulfide Dimethacrylate Transparent Homoand Copolymer Resins Having High Refractive Index
【24h】

Study on Syntheses and Properties of 2,2'-Mercaptoethylsulfide Dimethacrylate Transparent Homoand Copolymer Resins Having High Refractive Index

机译:高折射率的2,2'-巯基乙硫醚二甲基丙烯酸酯透明均聚物和合成树脂的研究

获取原文
获取原文并翻译 | 示例
           

摘要

2,2'-Mercaptoethylsulfide dimethacrylate (MESDMA)was synthesized from 2'2-mercaptoethylsulfide (MES)by a Phase-Transfer Catalysis technique and,was charactierized and corroborated by ~1H-NMR and FTIR spectra.Except for the poor impact strength, the MESDMA homopolymer resin shows better comprehensive properties, such an a higher refractive index (1.625),lower dispersion (Abbe's number 36),and good heat-resistance (T_g 150deg C)and surface hardness (3H),etc.Copolymerizing with styrene (St)can modify most of the properties of the resin.The refracive index,Abbe's number,onset wavelength, density,water-absorption ratio, and absorption intensity of peaks in NIR region,etc.all display a regular change along with the proportion of MESDMA/St.The main absorption peaks in NIR region are assigned as follows:1680 (first overtone) and 1144 nm(second overtone)to the phenyl C-H vibration of polystyrene;1694 nm (first overtone)to v(CH_3);1730 and 1750 nm(first overtone)to v(CH_2)for ordinary CH_2 and for CH_2 connected with S or COS groups,respectively;and 1186 nm (second overtone)to aliphatic C-H vibration.The prominent advantage achieved by copolymerization is that the impact strength can be improved as much as 10-fold at a proper composition of the monomers (75%St)
机译:通过相转移催化技术由2'2-巯基乙硫醚(MES)合成了2,2'-巯基乙硫醚二甲基丙烯酸酯(MESDMA),并通过〜1H-NMR和FTIR光谱进行了表征和确证。 MESDMA均聚物树脂具有更好的综合性能,例如较高的折射率(1.625),较低的分散度(阿贝数36),良好的耐热性(T_g 150°C)和表面硬度(3H)等。 St)可以改变树脂的大部分性能。反射率,阿贝数,起始波长,密度,吸水率和NIR区域中峰的吸收强度等都随其比例的变化呈现规律性变化。 MESDMA / St.NIR区域的主要吸收峰分配如下:聚苯乙烯的苯基CH振动为1680(第一泛音)和1144 nm(第二泛音); v(CH_3)为1694 nm(第一泛音); 1730和1750 nm(第一个泛音)到普通CH_2和f的v(CH_2)或CH_2分别与S或COS基团连接;以及1186 nm(第二个泛音)对脂肪族CH的振动。通过共聚获得的显着优势是,在适当的单体组成下,冲击强度可以提高多达10倍(75%St)

著录项

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