Evaluation of four ABS resins by thermal analysis

Four new commercial grades of rubber toughened ABS (acrylontrile-butadienestyrene) terpolymers were characterized by differential scanning calorimetry (DSC), mechanical analysis and gel permeation chromatography (GPC). These rubber toughened ABS molding compounds were manufactured by a new "ble...

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Bibliographic Details
Published in:Journal of thermal analysis 1996-03, Vol.46 (3-4), p.955-963
Main Authors: BAIR, H. E, BOYLE, D. J, TWOMBLY, B
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Summary:Four new commercial grades of rubber toughened ABS (acrylontrile-butadienestyrene) terpolymers were characterized by differential scanning calorimetry (DSC), mechanical analysis and gel permeation chromatography (GPC). These rubber toughened ABS molding compounds were manufactured by a new "blended technology" to yield resins which offer a broad range of flow properties and levels of toughness. Based upon DSC estimates of the level of rubber included, the four ABS compounds can be divided into two groups; the first has approx11 wt.% butadiene and the second near 18 wt.%. In addition, two styrene-acrylonitrile copolymers with different average molecular weights were found blended within each ABS group. By this blending process four resins are produced with impact strengths ranging from < 3 to approx7 ft/lb in exp -1 . These analytical results show that a resin's impact strength is enhanced not only by increasing the level of rubber particles in a given ABS compound but also by raising the molecular weight of the SAN which is blended into the terpolymer.
ISSN:0368-4466
1572-8943
DOI:10.1007/BF01983613