کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1395443 | 1501372 | 2015 | 6 صفحه PDF | دانلود رایگان |
• We prepared thermotropic liquid crystalline polypeptides bearing imidazolium and p-tolyl groups.
• We examined the solid-state structures and thermal properties of the resulting polypeptides.
• Increasing p-tolyl contents give rise to more stable liquid crystalline phase and higher glass transition temperatures.
Polypeptides bearing imidazolium and p-tolyl groups have been synthesized by click chemistry between poly(γ-3-azidopropyl-l-glutamate) (PAPLG) and 3-butyl-1-propargyl imidazolium bromide (BPIB) and 1-methyl-4-prop-2-ynyloxybenzene (MPB). The FTIR results revealed α-helical conformation of all resulting polypeptides in the solid-state. POM and WAXS study revealed that polypeptides with high p-tolyl contents (molar percentage ⩾54%) possessed nematic liquid crystalline phases and hexagonal packing in the solid-state. DSC analysis revealed the solid to liquid crystalline transitions in the temperature range of 35–42 °C.
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Journal: European Polymer Journal - Volume 63, February 2015, Pages 74–79