Insight into the Molecular Arrangement of High-Density Polyethylene Polymer Chains in Blends of Polystyrene/HighDensity Polyethylene from Differential Scanning Calorimetry and Raman Techniques

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Abstract:

Polystyrene/high-density polyethylene (PS/HDPE) blends were synthesized by melt blending in a single screw extruder. Co-continuity measurements using solvent extraction and scanning electron (SEM) micrographs showed that co-continuity was obtained around 35% PS. Thermal analyses measurements revealed a reduction in crystallinity of the HDPE phase around the co-continuous composition. Raman analyses across the entire composition range of these blends showed an increase in the normalized integral intensities of the 1128 cm−1 and 1061 cm−1 stretching vibrations of the HDPE molecules. The presence of all-trans HDPE chains that are not packed into an orthorhombic structure is used to explain the simultaneous occurrence of reduced crystallinity and increased intensity of all-trans HDPE stretch vibrations.

Keywords: BLENDS; POLYETHYLENE; POLYSTYRENE; RAMAN

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370206777412121

Affiliations: 1: AMIPP Advanced Polymer Center, Rutgers University, 607 Taylor Road, Piscataway, New Jersey 08854 2: Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854

Publication date: May 1, 2006

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