Citation: Zhi-min Li, Gang Zhang, Dong-sheng Li, Jie Yang. Polyamides Containing Thiadiazole Units：Synthesis and Optical Properties[J]. Chinese Journal of Polymer Science, ;2014, 32(3): 292-304. doi: 10.1007/s10118-014-1407-z shu

Polyamides Containing Thiadiazole Units：Synthesis and Optical Properties

1.
College of Polymer Materials Science and Engineering of Sichuan University, Chengdu 610065, China
2.
Institute of Materials Science &
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1. Institute of Materials Science &
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Received Date: 17 April 2013
Revised Date: 17 June 2013

Fund Project: This work was financially supported by the Youth Fund of Sichuan University (No. 2012SCU11009).

Highly refractive and transparent polyamides containing thiadiazole units have been developed. These polymers were prepared by a polycondensation reaction of 4,4'-(1,3,4-thiadiazole-2,5-thio) bis(methylene) dibenzoyl chloride (TDTBM-DC) and diamine which contained thioether (―S―) and sulfone units. They showed good thermal stabilities such as a relatively high glass transition temperature of 206-233 ℃and a 5% weight-loss temperature (T5%) of 376-395℃. The optical transmittance of the polymer at 450 nm is higher than 83%. The heterocycle units and plural ―S― linkages provide the polymer with a high refractive index of 1.716-1.725 at 633 nm and a low birefringence of 0.003-0.004. Also they showed improved solubility in polar aprotic solvents and could form moderate strength films with tensile strength of 72.8-83.1 MPa and storage modulus of 1.0-1.8 GPa (at 200℃).
- Synthesis,
- Optical property,
- Soluble,
- Heterocycle
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