Multicomponent polymeric systems, or polymeric blends, have recently created considerable interest and they represent a new and important challenge for research. These systems have already become technologically important, but the prospects for their applications have by no means been exhausted. For thermodynamic reasons polymer blends do not usually form homogeneous mixtures but exhibit micro or macrophase separation. This incompatibility has some inherent advantages as varying the composition and the processing conditions, materials with different structures and morphologies can be obtained whose properties may be superior to those of one of the components e. g. high impact resistant plastics. Investigations of multicomponent polymer systems constitute a new branch of macromolecular science which now claims as much interest as the behaviour of dilute solutions, crystallization, statistics of chain~~ tacticity, and single crystal formation did a few years ago. The complexity of the problems related to control led preparation and properties studies of mUlticomponent polymer systems is such that it is often more practicable to conduct them on an international basis. The aim of the first Joint Italian-Polish Seminar on Multicomponent Polymer Systems was to discuss recent results obtained in that field in both countries. As the range of topics to be covered was fairly wide, we thought it advisable to invite scientists from other countries to share with us some aspects of their own studies. Front Matter....Pages i-xii Recent Progress in the Studies on the Preparation and Properties of Polymer Blends....Pages 1-21 Morphology, Crystallization Phenomena and Transitions in Crystallizable Polymer Alloys....Pages 23-48 Properties of Polyethylene-Polypropylene Blends: Crystallization Behaviour....Pages 49-69 The Structure and Mechanical Properties of Blends of Cis and Trans-Polyisoprene....Pages 71-86 Crystallization and Melting of Components in Blends of Polyethylene and Polypropylene....Pages 87-100 Morphology, Crystallization and Melting Behaviour of Poly(Ethylene Oxide)/Poly(Methyl Methacrylate) Blends....Pages 101-121 Le Role des Copolymeres Sequences et Greffes dans les Alliages de Polymeres....Pages 123-141 Synthesis and Properties of New Toughened Resins Based on Ethylene-Propylene Copolymers....Pages 143-166 Macromolecular Alloy Systems: A Contribution to the Determination of the Structure of Impact Resistant Polyamide - Polyolefin - Alloys....Pages 167-190 Synthesis of Interfacial Agents and Their Use in Nylon 6/Rubber Alloys....Pages 191-200 Tensile Properties and Morphology of Copolymer Modified Blends of Polystyrene and Polyethylene....Pages 201-237 Mechanical Models of Heterogeneous Polymeric Materials....Pages 239-264 Mechanical Properties of Multicomponent Polymeric Materials: A Predictive Classification of Binary Systems....Pages 265-280 Properties of Polystyrene-Polyolefin Alloys: I. Processing and Mechanical Properties....Pages 281-293 Properties of Polystyrene-Polyolefin Alloys: II. Processing Morphology Relationship....Pages 295-318 Morphology and Mechanical Properties of SXS-Polystyrene Blends....Pages 319-331 Synthesis of Interpenetrating Polymer Networks and their Possible Uses....Pages 333-347 Mechanical and Thermal Properties of Polycarbonate - Aromatic Copolyester Blends....Pages 349-362 Preliminary Investigation of Polycarbonate-Polypropylene Blends....Pages 363-372 Multicomponent Polyester Systems with Mesogenic Units....Pages 373-381 Transport Properties and Morphology of Polymeric Blends....Pages 383-395 The Phase Structure of Poly(N-Vinylcarbazole)-Polycarbonate Blends as Studied by Thermally Stimulated Currents and Thermo-Optical Analysis....Pages 397-405 Stress Relaxation of Glass Bead Composites....Pages 407-420 Studies on the Properties and Structure of Adhesive Films Containing Elastomer/Resin Blends....Pages 421-430 Polymeric Modifier for Filled Polypropylene....Pages 431-449 Milticomponent Selective Membranes Made of Ionic/Nonionic Polymers....Pages 451-468 Polyolefinic Blends: Recent Applications and Developments....Pages 469-484 Dispersive Mixing of Polymer Melts in the Static Mixer....Pages 485-503 Back Matter....Pages 505-510
