High Glass Transition and Optical Transparency of Novel Organosoluble Polyamides Containing 4-tert--Butyltoluene Moiety
✍ Scribed by Chenyi Wang; Xiaoyan Zhao; Guang Li; Jianming Jiang
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 113 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0256-7660
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✦ Synopsis
Abstract
A series of novel polyamides 3a–3d containing 4‐__tert‐__butyltoluene moiety, were prepared using the phosphorylation polycondensation technique. FT‐IR and ^1^H NMR techniques were used to investigate the chemical structures of 3a–3d. The results confirmed that they agreed with the proposed structures for 3a–3d completely. The 3a–3d had inherent viscosities ranging from 0.71 to 1.67 dL·g^−1^. All the polyamides showed excellent solubility, with the dissolvability at a concentration of 10 wt% in most amide polar solvents. Flexible and tough polyamide films could be prepared by casting from DMAc (N,N‐dimethylacetamide) solvent. Their films were nearly colorless and exhibited high optical transparency, with the UV cutoff wavelength in the range of 346–363 nm and transmittance higher than 80% at 450 nm. They also exhibited high glass transition temperatures in the range of 310–343°C and the onset decomposition temperatures in the range of 435–462°C in nitrogen atmosphere. Meanwhile, these polyamide films possess good mechanical properties with tensile strengths of 76.4–86.1 MPa and elongations at break of 11.2%–27.3%. Due to those properties, these polyamides could be considered as photoelectric and microelectronic materials.