کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7215708 | 1469522 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Wood fiber reinforced multicomponent, multiphase PP composites: Structure, properties, failure mechanism
ترجمه فارسی عنوان
کامپوزیت پلی کربنات چندپامانی فشرده چوب، ساختار، خواص، مکانیسم شکست
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
Polypropylene (PP) was reinforced with wood flour and impact modified with elastomers to increase stiffness and impact resistance simultaneously. Elastomer was added in 0, 5, 10 and 20Â wt%, while wood content changed from 0 to 60Â wt% in 10Â wt% steps. Structure and adhesion were controlled by the addition of functionalized (maleated) polymers. Composites were homogenized in a twin-screw extruder and then injection molded to tensile bars. The results showed that composite structure is determined by the relative strength of adhesion and shear forces prevailing during processing. Structure can be controlled by the application of functional polymers within limits. Although embedding is favored by thermodynamics and further promoted by coupling, de-encapsulation occurs at the large shear stresses of injection molding even in the presence of a functionalized elastomer. Composite properties depend on composition, increasing elastomer content results in decreasing stiffness and strength. Model calculations showed that the elastomer does not contribute to load bearing, average stress in the matrix increases with increasing elastomer content. Local stresses and adhesion define the initiation of deformation processes around wood particles, which start at the same stress irrespectively of elastomer content. Local processes determine the mechanism of failure and composite strength independently of their mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 103, 28 October 2014, Pages 106-112
Journal: Composites Science and Technology - Volume 103, 28 October 2014, Pages 106-112
نویسندگان
András Sudár, Christoph Burgstaller, Károly Renner, János Móczó, Béla Pukánszky,