Contents: On the secondary molecular structures dependence of physical behaviour of polymers -- 1. fundamentals and model microstructures for poly(vinylchloride) and polypropylene; On the secondary molecular structures dependence of physical behaviour of polymers -- 2. Application to thermal relaxations, ageing and basic electrical properties of poly (vinylchloride) and polypropylene; An essay on asymmetric polymerisation and the origin of chirality in the biologically active macromolecules; Polydisulfides as thermostabilisers of polythylene with intramolecular synergetic effect; Several peculiarities of the behaviour of molecules of low-molecular substances in the presence of chain molecules; Ozonolisis of polydienes; Thermal degradation of rice husk and other biomass materials; Polyurethanes in Biological Media; Ozone resistance of butadiene -- acrylonitrile rubber and ethylene -- propylene terpolymer covulcanizates; Structural study of methycellulose blends by fractal analysis; Inhibitor radicals in the process of styrene polymerisation.