This is the second volume in this series which is devoted to the memory of World Renowned Scientist professor Rusanov Alexander L'vovich. The authors have highlighted in this volume the information about synthesis and properties of some heterochain polymers; polymer chain containing alternating phthalide groups and hydrocarbon structures without geteroatoms; proton-conducting membranes on the basis of sulfonated polyphenylquinoxalines; anionic ring-opening polymerisation of e-caprolactam in the presence of an ionic liquid; synthesis of polythienophenes and the modification of materials surfaces by functional oligoorganosiloxanes.