1,721,338 research outputs found
Molecular approaches to polymer blends for innovative structural and smart materials of practical interest
No full textLiquid crystalline side chain polysiloxanes with 4-cyano- and 4-alkoxy-stilbene mesogenic units
No full textWater extration and degradation of a sterically hindered phenolic antioxidant in polypropylene films
No full textRecent advances and new developments in optical rotatory dispersion and circular dichroism
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13C NMR study of radical copolymers of (-)-menthyl methacrylate with trans-4-methacryloyloxyazobenzene
No full textThe 50.3 MHz 13C NMR of free radical copolymers of (-)-menthyl methacrylate with trans-4-methacryloyloxyazobenzene having different composition was investigated in CDCl3 solution at room temperature. The smooth variation of the chemical shifts of aromatic carbons with chemical composition points to a random distribution of the monomeric units along the polymer chain. Analysis of the carbonyl signal allows one to determine the main chain stereochemistry of copolymers in which one monomer predominates. Apart from the macromolecular nature, no appreciable effect on local mobility is observed arising from different neighboring units and stereoregularity
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