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Studies on the Reaction of Acrylonitrile Butadiene Styrene to Melt Processing Conditions
Author(s) -
Vadori Ryan,
Misra Manjusri,
Mohanty Amar K.
Publication year - 2015
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201400415
Subject(s) - polybutadiene , materials science , polymer , polymer chemistry , acrylonitrile butadiene styrene , acrylonitrile , viscosity , shear rate , shearing (physics) , chemical engineering , composite material , copolymer , engineering
Acrylonitrile butadiene styrene (ABS) was investigated for its reaction to melt processing. Studies were done in a lab scale micro extruder and injection molder. It was found that during typical processing times, the ABS begins to undergo a hydrogen abstraction reaction in the presence of oxygen in its polybutadiene (PB) phase. This leads to a crosslinking of the PB chains, which in turn can have an effect on the performance of the polymer. The ABS also was shown to undergo chain scission, opposing the crosslinking effect on the viscosity of the polymer. With higher temperatures, it was found that the crosslinking occurred earlier and at a faster rate. Crosslinking preceded chain scission such that the higher temperatures had the highest peak viscosities. Ultimately, chain scission became the dominant mechanism, decreasing the viscosity. Similar results were seen with changing retention time. Higher retention times in the melt increased the viscosity to a point before decreasing again. During processing, it was found that temperature and shearing both have an effect in progressing the reaction.