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Sorption properties of materials based on sodium liquid glass modified by polyvinyl alcohol and polyvinylpyrrolidone on regarding to different acid-base indicators were investigated. The effect of the nature of metal and polymer modifier (polyvinyl alcohol and polyvinylpyrrolidone) on the amount of active centers and specific active surface area of such material was determined. Moisture absorption of modified and not modified silicate materials was founded. The effect of Ni-containing polymer-silicate materials on the speed of curing of compositions based on unsaturated polyester resins was determined.

Nanocomposites were prepared with different grades of nitrile rubber with acrylonitrile contents of 19, 34, and 50%, with styrene–butadiene rubber (23% styrene content), and with polybutadiene rubber with Na‐montmorillonite clay. The clay was modified with stearyl amine and was characterized by X‐ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and transmission electron microscopy (TEM). The XRD studies showed an increase in the gallery gap upon the modification of the filler by stearyl amine. The intercalation of the amine chains into the clay gallery gap was confirmed by the presence of some extra peaks (2928, 2846, and 1553 cm−1) in the FTIR spectra. The clay–rubber nanocomposites were characterized by TEM and XRD. The mechanical properties were studied for all the compositions. An improvement in the mechanical properties with the degree of filler loading up to a certain level was observed. The changes in the mechanical properties, with changes in the nature and polarity of the rubbers, were explained with the help of XRD and TEM results. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 1573–1585, 2004

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An environmentally benign emulsion polymerisation technique was exploited to prepare a bio based polymer from a naturally occurring monoterpene, b-myrcene. The structure of the polymer was ascertained by spectroscopic measurements. Density functional theory was employed to determine the ground state optimised structure of b-myrcene. The persulfate initiated polymyrcene possesses 3,4 and 1,2 vinyl defects along with 1,4 microstructures, whereas the redox analogue contains solely 1,4 addition products. The synthesised polymer displayed a substantially high molecular weight (upto 92 860 Da for persulfate polymyrcene) and subzero (À73 C) glass transition temperature along with shear thinning behaviour within the experimental conditions, thereby rendering itself as a promising entrant in the domain of bio-based elastomers. ; Fax: +91 3222 220312; Tel: +91 3222 283180 † Electronic supplementary information (ESI) available: Wide angle XRD analysis, particle morphology of the latex emulsion. See