Can I read Optical Monitoring of the Injection Molding of Intercalated Polypropylene Nanocomposites on EtoBox?

Optical Monitoring of the Injection Molding of Intercalated Polypropylene Nanocomposites by Fernando Moretti; Márcia M. Favaro; Márcia C. Branciforti; Rosario E.S. Bretas is a Materials Science article available to read on EtoBox.

What is Optical Monitoring of the Injection Molding of Intercalated Polypropylene Nanocomposites about?

## Abstract Intercalated polypropylene (PP)/clay nanocomposites were produced by twin screw extrusion; afterwards, the optical monitoring of their injection molding was done using a laser sensor. The transmitted light intensity as a function of molding time was measured. The mold and melt temperatures, packing pressure and flow rate were changed. The nanocomposite had higher induction times than the PP, that is, scattering structures were detected later in the nanocomposite than in the PP, which was attributed to a retardation effect promoted by the clay on the PP crystallization growth rate. The morphologies of the injection molded samples were analyzed by polarized light optical microscopy, differential scanning calorimetry and transmission electron microscopy. The nanocomposite samples showed a second core, a thicker skin layer, highly oriented nanoclay's tactoids in the skin region and average spherulites' sizes smaller than the PP. The final light intensity __I__~f~ was correlated with the spherulites' sizes: high values of __I__~f~ represented samples with large spherulites. The PP sample had average spherulites' sizes larger than the Nano samples. However, the surging of a s

Who reads Optical Monitoring of the Injection Molding of Intercalated Polypropylene Nanocomposites?

Author

Fernando Moretti; Márcia M. Favaro; Márcia C. Branciforti; Rosario E.S. Bretas

Publisher

Society for Plastic Engineers; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0032-3888)

Published

2010

Language

EN

Field

Materials Science (Physical Sciences)