Polyvinyl chloride - Processing and structure
Abstract - Widely different procedures for the processing of PVC have proved themselves and have succeeded in practice on the basis of the special physical and chemical properties of PVC. In this connection a distinction must be made between the processing of plasticized PVC and the relatively difficult processing of rigid PVC. A survey of the most important methods of preparation and processing is given here. The special, rather abnormal properties of PVC in comparison with other thermoplastics are partly a result of its characteristic structure. The consequences for preparation and processing must therefore be considered anew. Of course, the globular structure of PVC has an effect on the behaviour of the solid-state material and the melt, too, so that great importance must be attributed to the processes at the particle interface.
Use of acetone in determining poly(vinyl chloride) processing morphology and product morphology
Abstract Acetone swells PVC very rapidly but reaches a limit in swelling. This limit suggests a crosslinked network. Acetone apparently enters only the amorphous PVC and does not destroy the crystallites which act as crosslinks. For this reason acetone-swelled then sheared specimens were used to assess the structure of PVC. After melting at 162°C, PVC shows very little interaction of primary particles (1 μm) as judged by their ease of separation in acetone. At 177°C melt temperature the primary particles are not destroyed but show excellent interaction or fusion as judged by the presence of fibrils when swelled and sheared in acetone. Apparently melting of some crystallites allows strong interaction between primary particles; however, not all the crystallites are melted, therefore maintaining the residual primary particle structure. At 215°C, the residual primary particle structure disappears apparently by complete melting of crystallites. Surface roughness, toughness, and toughness retention upon weather...
The politics of affect and emotion in contemporary Latin American cinema : Argentina, Brazil, Cuba, and Mexico
Between Neo-realist Sentimentality and Modernist Shock: New Latin American Cinema and Beyond Thrilling Histories: Questions of Genre and History Affecting Legacies: Contemporary Structures of Feeling Alien/Nation: Contemporary Youth in Film Emotional Investments: Global Networks and Transnational Affective Communities