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首页> 外文期刊>Journal of Applied Polymer Science >Study on syntheses and properties of 2,2 '-mercaptoethylsulfide dimethacrylate transparent homo- and copolymer resins having high refractive index
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Study on syntheses and properties of 2,2 '-mercaptoethylsulfide dimethacrylate transparent homo- and 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共聚物树脂的合成与性能研究

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2,2'-Mercaptoethylsulfide dimethacrylate (MESDMA) was synthesized from 2,2'-mercaptoethylsulfide (MES) by a Phase-Transfer Catalysis technique and, was characterized and corroborated by H-1-NMR and FTIR spectra. Except for the poor impact strength, the MESDMA homopolymer resin shows better comprehensive properties, such as a higher refractive index (1.625), lower dispersion (Abbe's number 36), and good heat-resistance (T-g 150 degrees C) and surface hardness (3H), etc. Copolymerizing with styrene (St) can modify most of the properties of the resin. The refractive 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 nu(CH3); 1730 and 1750 nm (first overtone) to nu(CH2) for ordinary CH2 and for CH2 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). (C) 2000 John Wiley & Sons, Inc. [References: 9]
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H-1-NMR和FTIR光谱进行了表征和确证。除了较差的冲击强度外，MESDMA均聚物树脂还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（Tg 150摄氏度）和表面硬度（3H）。 ）等。与苯乙烯（St）共聚可改变树脂的大多数性能。折射率，阿贝数，起始波长，密度，吸水率和NIR区域中峰的吸收强度等均随MESDMA / St的比例呈规则变化。 NIR区域的主要吸收峰分配如下：聚苯乙烯的苯基C-H振动为1680（第一泛音）和1144 nm（第二泛音）。 1694 nm（第一泛音）为nu（CH3）;对于普通CH2和与S或COS基团相连的CH2，分别为1730和1750 nm（第一泛音）至nu（CH2）; 1186 nm（第二个泛音）使脂肪族C-H振动。通过共聚获得的显着优势是，在单体的适当组成（75％St）下，冲击强度可以提高多达10倍。 （C）2000 John Wiley＆Sons，Inc. [参考：9]

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