Research Progress on Synthesis and Properties of Sulfur⁃Containing High Refractive Index Optical Resins

doi:10.19894/j.issn.1000-0518.210136

Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (5): 723-735.DOI: 10.19894/j.issn.1000-0518.210136

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Research Progress on Synthesis and Properties of Sulfur⁃Containing High Refractive Index Optical Resins

Xiao-Feng GUO¹^,², Jia-Lin LI²(), Yu-Bo WANG¹^,², Jun-Su JIN¹()

^1.College of Chemical Engineering，Beijing University of Chemical Technology，Beijing 100029，China
^2.Bohua Chemical Technology Co. Ltd，Tancheng 276100，China

Received:2021-03-22 Accepted:2021-07-07 Published:2022-05-01 Online:2022-05-24
Contact: Jia-Lin LI,Jun-Su JIN
About author:jinjs@mail.buct.edu
abcljl@163.com.cn
Supported by:
the National Natural Science Foundation of China(21878017)

Abstract

Abstract:

As a substitute for inorganic glass， organic optical resin has the advantages of light mass， good impact resistance， easy processing， and strong adjustability. The refractive index is one of the main parameters of optical resins. The level of refractive index can directly affect the thickness， aesthetics and comfort of the finished lens. Improving the refractive index of optical resins without reducing the overall performance of optical resins has always been a hot and difficult point in this field. The introduction of sulfur with high molar refractive index into optical resins is considered to be one of the most effective and commonly used methods. In this paper， sulfur-containing optical resins are divided into olefins， epoxys， episulfides， sulfur heterocyclic rings， and polyurethanes. The research progress in recent years at home and abroad is briefly reviewed， involving monomer synthesis， monomer polymerization， and the influences of monomer structures on the comprehensive performances of optical resins. The properties and development of the above materials are also analyzed.

Key words: Optical resin, High refractive index, Sulfur element, Comprehensive performance

CLC Number:

O631

Xiao-Feng GUO, Jia-Lin LI, Yu-Bo WANG, Jun-Su JIN. Research Progress on Synthesis and Properties of Sulfur⁃Containing High Refractive Index Optical Resins[J]. Chinese Journal of Applied Chemistry, 2022, 39(5): 723-735.

Figures/Tables 17

Fig.1 Structure of CR-39

Table 1 Molar refractive index of some atoms or groups［1］

原子/基团 Atoms/groups	摩尔折射率 Molar refractive index/（cm³?mol^-1）	原子/基团 Atoms/groups	摩尔折射率 Molar refractive index/（cm³?mol^-1）
H	1.100	F	0.898
C	2.418	Cl	5.967
—CH₃	5.644	Br	8.865
—CO—NH-	7.230	I	13.900
—S—	7.920	—SH	7.690
—S—S—	8.110	—SO₂—	9.630
	25.463		43.000

Fig.2 Structure of CO-PS and TPS［7］

Fig.3 Structure of thin film SA［8］

Fig.4 Structure of sulfur-containing olefins［9-10］

Fig.5 Structure of P1 and PTEI［11-12］

Fig.6 Structure of mercaptans and olefins［13］

Fig.7 One-step and two-step methods to prepare sulfur-containing epoxy monomers

Fig.8 Sulfur-containing epoxy monomer structures［20-22］

Fig.9 Structures of OBDMT and TEP［23-24］

Fig.10 Preparation of episulfide monomer from epoxy monomer

Fig.11 Structures of episulfide［32-33］

Fig.12 Structure of episulfide monomers BAES［34］ and TBET［36］ prepared by thiourea

Fig.13 Structures of polyimides［38-41］

Fig.14 Polymer structures polymerized by sulfur-containing heterocyclic ring［45，47］

Fig.15 Structures of common mercaptans and isocyanates［49-50］

Fig.16 Structures of OU and HA ［51-52］

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Research Progress on Synthesis and Properties of Sulfur⁃Containing High Refractive Index Optical Resins

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