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http://dx.doi.org/10.9713/kcer.2014.52.2.266

Effects of Phenolic and Phosphite Antioxidants on the properties for PC/ABS Blends during High-Shear-Rate Processing  

Lee, Han Ki (Department of Polymer Materials Research Team, Automotive Research&Development, Hyundai Motor Group)
Kim, Seon Hong (Department of Advanced Polymer Engineering, Chungnam National University)
Lee, Hyung Il (Department of Advanced Polymer Engineering, Chungnam National University)
Yoo, Jae Jung (Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Yong, Da Kyoung (Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Choi, Seok Jin (New Technology Development Team, Research & Development Division)
Lee, Seung Goo (Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Lee, Kee Yoon (Department of Advanced Polymer Engineering, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.52, no.2, 2014 , pp. 266-271 More about this Journal
Abstract
The effects of antioxidants on the properties of Polycarbonate/Acrylonitrile-Butadiene-Styrene(PC/ABS) blends were studied for the functions of the screw speed and loaded duration of high shear rate processing in order to investigate the degradation for PC/ABS blends. Tris-(2,4-di-tert-butyl-phenyl phosphate) (A1) and Bis(2,4-dicumylphenyl) pentaerythritol diphosphite (A3) as phosphite antioxidants and Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (A2) as a phenolic antioxidant are used. The thermal properties were detected by TGA and severely decreased, after the processing. The stress-induced and thermal degradation for PC/ABS blends with the antioxidant A3 was retarded better than the others. By using UTM, the mechanical properties also showed individually decreased according to the antioxidants, after the processing, especially, the elongations showed considerable decline behaviors, while the tensile strengths of PC/ABS blends changed very little. For example, in the operating conditions of 1000rpm of screw speed and 20 seconds of loaded period, the elongations decreased from 148% before the processing, to 91.6% with the A1, to 63% with the A2 and to 131% with the A3 after the processing, respectively. In order to get the morphological properties, the size distributions of the dispersed phases for PC/ABS were investigated by SEM analysis and tended to decrease, as the screw speed and loaded period of the processing increased. Therefore, we confirmed that the antioxidant A3 was the best of all of three to inhibit the stress-induced degradation of PC/ABS blends during the high shear rate processing.
Keywords
PC/ABS Blend; Antioxidant; Degradation; High Shear Processing; Thermogravimetric Analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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