@inproceedings{ea48e6a70779483c8703d4b63c4412fa,
title = "Morphological effects on glass transitions in immiscible polymer blends",
abstract = "This paper describes the effects of structures on the glass transition of glassy polymers blended with a semi-crystalline polymer. Immiscible blends of PS/PP and PS/HDPE were prepared from commercially available polymers using melt processing and extrusion without additives. The weight fractions of the components were varied from 0 to 1. SEM analysis of the blends showed a range of morphologies over the composition range from small inclusions at low volume concentrations through intertwined co-continuous structures at specific intermediate compositions, and a reversal of this configuration at high volume fractions. The glass transition of the glassy polymer was measured with differential scanning calorimetry using the sensitive and high resolution modulated DSC method. A systematic change in glass transition of glassy polymers is observed as a function of composition in various immiscible polymer blends. Results show that the glass transition of polystyrene increases with a reduction in volume fraction, by approximately 5.4°C in polypropylene and 6.5°C in polyethylene. Probable models which might explain this effect are mentioned.",
author = "Thirtha, {Vivek M.} and Lehman, {Richard L.} and Nosker, {Thomas J.}",
year = "2004",
doi = "10.1557/proc-856-bb11.12",
language = "English (US)",
isbn = "155899808X",
series = "Materials Research Society Symposium Proceedings",
publisher = "Materials Research Society",
pages = "144--149",
booktitle = "Multicomponent Polymer Systems",
address = "United States",
note = "2004 MRS Fall Meeting ; Conference date: 29-11-2004 Through 03-12-2004",
}