POLYMER
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2019
·
IF 3.771
Liping Jiang,Ruixia Kong,Yuliang Yi,Siqi Yang,Yu Mei,Xiaofei Feng,Zhanhai Yao,Jianfu Zhang
The present work proposes a facile but effective method for the design and synthesis of optical polymers with both high refractive index (RI) and Abbe number (AN) by the direct introduction and dispersal of elemental sulfur in polystyrene (PS). The excellent dispersal of the reaction products of elemental sulfur with styrene (St-S) in the PS result in the highest RI of 1.6220 and AN of 27.3. The acceptable uniform dispersal of elemental sulfur in the PS is verified by photographic analysis, optical transmission spectra, scanning electron microscopy, and energy dispersive spectroscopy analyses. The thermal properties of polymeric materials were investigated using thermogravimetric analysis and differential scanning calorimeter. The proposed strategy not only provides a new high RI material for optical applications, but also offers new opportunities for the dispersal of substances into polymeric materials.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2025
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IF 4.7
Zongao Dou,Jiajun Li,Zichen Shi,Jing Sun,Qiang Fang
Carbazole-based polymers having a high refractive index of above 1.70 and desirable Abbe number are reported here. These polymers were prepared by the photoclick thiol–ene reaction of two types of allyl-containing carbazole monomers with thiophenol or mercaptans. Among the monomers, those possessing allyl substituents at positions 2 and 7 give the polymers with higher refractive index and satisfactory Abbe number. The polymers also display good thermal and mechanical properties. Moreover, the films prepared from these polymers exhibit good surface roughness. This is a first example regarding the high refractive index polymers derived from allyl-containing carbazoles, and the results suggest the polymers have a potential application as the optical materials in the industry.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
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IF 3.794
He Zhang,Hao Wang,Honggang Gu,Xiao Zong,Bingtian Tu,Pengyu Xu,Bin Wang,Weimin Wang,Shiyuan Liu,Zhengyi Fu
Non-stoichiometric MgO·1.8Al 2 O 3 spinel transparent ceramic was prepared from synthesized single phase powder through an aqueous gel-casting forming technique. In order to prevent hydrolysis, the powder was specially treated in toluene with stearic acid and then dispersed in an aqueous solution with the help of amphoteric compound Tween 80 and dispersant TMAH. The surface modification process was confirmed by various techniques such as Fourier transmission infrared absorption spectroscopy (FT-IR), pH value, zeta potentials and rheological properties. Afterwards, gel-casted green compacts were debinded, pressureless-sintered (PS) and hot-isostatic-pressed (HIP). Highly transparent MgO·1.8Al 2 O 3 ceramics (3.6 mm in thickness) with in-line transmittance values of 77–82 % in visible region and higher than 85% in near infrared region were obtained. The samples exhibited Knoop hardness of 12.2 ± 0.2 GPa, Young’s modulus of 302 GPa, refractive index of 1.7046, and Abbe's number of 75.8.
研究领域:
材料科学
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陶瓷
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光学材料
✓ 已验证
DOI
高影响因子
BIOMACROMOLECULES
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2024
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IF 5.5
Zongao Dou,Hemin Zhang,Jiajun Li,Jing Sun,Qiang Fang
Four biobased phosphate-containing aryl monomers with methoxy, allyl, and vinyl groups as substituents have been successfully synthesized. Copolymerizing these monomers with thiophenol or mercaptans via the photoclick thiol–ene reaction gives the polymers with refractive indices (nD) of 1.63–1.70 and Abbe numbers (vD) of 12.8–38.5. An investigation of the relationship of the vD values with the substituents on the benzene rings of the monomers indicates that methoxy and vinyl groups can collectively increase the vD values. In comparison with allyl groups, vinyl groups endow the polymers with both higher nD and vD. Moreover, these polymers also display high transmittance, high thermostability, and low haze values in the visible-light region, suggesting that these biobased functional monomers are satisfactory precursors used in the fabrication of optical devices.
研究领域:
材料科学
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聚合物化学
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光学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2017
·Vol. 7
·期 78
·49490-49497
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IF 3.108
Lan-Fang Hu,Yang Li,Bin Liu,Ying-Ying Zhang,Xing-Hong Zhang
This study describes the catalytic formation of alternating and regioregular copolymers from carbonyl sulfide (COS) and epoxides along with eugenol-based glycidyl ether (EGE) and guaiacol-based glycidyl ether (GGE), derived from eugenol and guaiacol, respectively. The (salen)CrCl [salen = N,N′-bis(salicylidene) cyclohexanediimine] complex, accompanied with various organic bases, was highly active towards the EGE/COS, GGE/COS copolymerization and EGE/GGE/COS terpolymerization. The turnover of frequency (TOF) of the (salen)CrCl complex for the EGE/COS copolymerization was up to 12 000 h−1. The number-average molecular weight (Mn) of the resultant EGE/COS copolymer was up to 62.2 kg mol−1. In the presence of 0.5–1.5 mol% chlorohydrin, which was a by-product of the synthetic process of EGE, α-Cl, ω-OH EGE/COS copolymers were obtained. This result suggests that chlorohydrin could act as a very efficient chain transfer agent for the copolymerization. The EGE/COS, GGE/COS, and EGE/GGE/COS copolymers were soluble in most of the common solvents and exhibited a high refractive index of more than 1.58 with high Abbe numbers of up to 40.4. This study provides an unprecedented and sustainable synthetic route for making soluble sulfur-rich polymers with high optical properties.
研究领域:
高分子化学
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材料科学
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可持续化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）