摘要
通过 2 ,2 -二巯基乙硫醚 ( MES)与环氧氯丙烷反应合成了 2 ,2 -二巯基二乙硫醚二缩水甘油醚型环氧树脂 ( DGEMES) ,通过 FTIR和 MS对其进行表征 ;用乙二胺作为固化剂 ,将 DGEMES与双酚 A型环氧树脂 ( DGEBA)复合固化 ,得到了新型高折射率和低色散的光学树脂 .DGEMES是一种较好的共聚单体 ,可以同时提高共聚树脂的折射率和阿贝数 ;DGEBA/ DGEMES/乙二胺共固化树脂的 nd=1 .5 9～ 1 .6 2 ,νd=35～39;当 DGEMES的质量分数为 4 0 %时 ,固化树脂的折射率达到 1 .6 0以上 ,冲击强度 2 2 .5 k J/ m2 ,且其它性能较均衡 .此外 ,以甲基六氢苯酐 ( B-6 5 0 )为固化剂 ,还合成了具有中等折射率的 DGEBA/ DGEMES/ B-6 5 0共固化树脂 ( nd=1 .5 4～ 1 .5 6 ,νd=38～ 4 0 ) 。
Bis( β epoxypropylthioethyl) sulfide(DGEMES) was synthesized from 2,2 dimercaptoethyl sulfide(MES) and epichlorohydrin and its structure was characterized by FTIR and MS. Ethylenediamine was used to cure the mixture of DGEMES and DGEBA, a novel optical resins with a high refractive index and low dispersion were obtained. The studies indicated that DGEMES is a good monomer for copolymerization. With increasing its content, the refractive index and Abbe number of the copolymer can be increased at the same time. The cured resins of DGEMES/DGEBA/ethylenediamine have a higher refractive index 1.59-1.62 and a large Abbe′s number 35-39; especially, when the content of DGEMES is 40% in weight, the cured copolymer has a high refractive index( n d>1.60) and a higher impact strength( 22.5 kJ/m 2) , and other well balanced properties, which is also important for optical materials. In addition, B 650 was used as a curing agent, the cured resins of DGEMES/DGEBA/B 650 were prepared, which possess middle degree of refractive index. The n d and ν d values of the resins, ranging between 1 54-1 56 and 38-40, were measured by refractometer, the optical and mechanical properties of them were discussed in this paper.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第11期1924-1928,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学杰出基金 (批准号 :2 992 5 412 )资助
