Contents: Preface; IX Conference on Degradation and Stabilisation of Polymers; Multi-Component Photoinitiating Systems in Solid Polymers: Mechanisms of Mutual Enhancement and Kinetic Models; Achievements and Research Tasks for Poly(vinylchloride) Ageing and Stabilisation; Heterogeneous Peculiarities of Polymeric Hydrocarbons' Autooxidation; Exitonik Processes of Polymer Photodegradation and Photostabilisation; Evaluation of Kinetics Rate Constants from Spectra Data by Successive Baylsian Estimation; Prediction of Antioxidants Activity Using DSC Measurments. in Presence of Nitrogen Dioxide; Physical Aging of Polymer Concrete; Kinetics of Heterophase Interaction of Poly(ethylene terephthalate) with Alkalis; Biodegradation of Composite Films on Polyethylene Base; Crosslinking and Destruction of Poly(acryl-amide-co-sodium acrylate) by Electronic Beam Irradiation; Biodegradable Blends of Starch and Cellulose Derivatives; Low Combustible Poly(vinyl chloride) Composites with Mixtures of Plasticisers; Thermal Degradation and Combustion of Polymeric Blends; The Peculiarities of Thermal Degradation of Net Polymers in Conjugated Bonds Based on Dimethacrylates Containing Diacethylene Groups; Effect of the Structure of Starting Oligomer on Mechanical Properties and Combustion Rate of Diacetylenedimethacrylate Polymers; Regularities of Network Polymers Degradation; Modification of Butadiene-Nitrile Rubbers with Natural Zeolites as the Means to Improve Stability of Properties under the Conditions of Combined Impact of Hydrocarbon Media and Low Temperatures; Role of Topological Disorder in Polymer Oxidation; Physical-Mechanical Properties of Poly(ethylene-co-vinylacetate) S