Determination of Mechanical Performance and Microstructural Properties of Glass Fiber/EPDM/Polyamide-6 Composites

Öz

The EPDM elastomer added to polyamide-6 (PA-6) polymer reduces the tensile strength and modulus of elasticity of the material, while the added glass fibers decrease the elongation at break of the composite. Therefore, it is of great importance to produce elastomer and fiber reinforced polymer composites together in order to obtain composites with high mechanical properties demanded by the industry, namely high strength, high rigidity and superior fracture toughness (impact energy). In this experimental study, mechanical behaviors of unfilled PA-6 polymer, 8wt.% of Ethylene-Propylene-Diene-Monomer (EPDM) filled polyamide-6 (PA6-8EPDM), 10wt.% of glass fiber (GF) filled polyamide-6 (PA6-10GF) and 10wt.% GF/8wt.% EPDM filled polyamide-6 (PA6-10GF-8EPDM) polymer composites were investigated. Polyamide-6 based polymer composites were first produced in granule form in an industrial type twin screw extruder machine and then the mechanical test samples were molded using a conventional type injection molding machine. As a result of the study, the tensile strength decreased by 19.3%, the modulus of elasticity decreased by 41.4%, while the impact strength increased by 14.1% with the addition of 8wt.% EPDM to the PA6 polymer. On the other hand, with the addition of 10wt.% glass fiber to the PA6 polymer, the tensile strength increased by 23.6%, the modulus of elasticity increased by 64.8% and the impact strength decreased by 63.4%. The flexural strength and flexural modulus of the PA6 composite increased by 67.0% and 94.0% with the addition of 10wt.% GF to PA6 polymer, respectively

Anahtar Kelimeler

• PA6
• EPDM
• Glass fiber
• Mechanical Properties

Cam Elyaf/EPDM/Poliamit-6 Kompozitlerin Mekanik Performansının ve Mikroyapısal Özelliklerinin Belirlenmesi

Öz

Poliamit-6 polimerine ilave edilen EPDM elastomeri, malzemenin çekme dayanımı ve elastiklik modülü gibi değerlerini azaltırken ilave edilen cam elyaflar kompozitin kopma uzamasını azaltmaktadır. Dolayısıyla endüstrinin talep ettiği yüksek mekanik özelliklere yani yüksek mukavemet, yüksek rijitlik ve üstün kırılma tokluğu (darbe enerjisi) gibi özelliklere sahip kompozitlerin elde edilebilmesi için elastomer ve elyaf takviyeli polimer kompozitlerin birlikte üretilmesi büyük önem arz etmektedir. Bu çalışmada, katkısız poliamit 6 (PA6) polimeri ile ağırlık olarak %8 oranında Etilen-Propilen-Dien-Monomer (EPDM) katkılı poliamit 6 (PA6-8EPDM), %10 oranında cam elyaf (CE) takviyeli poliamit 6 (PA6-10CE) ve %10 CE ve %8 oranında Etilen-Propilen-Dien-Monomer katkılı poliamit 6 (PA6-10CE-8EPDM) polimer kompozitlerin mekanik özellikleri incelenmiştir. Poliamit-6 esaslı polimer kompozitler, endüstriyel tip ikiz vidalı bir ekstrüder makinesinde önce granül formda üretilmiş sonra da mekanik test numuneleri geleneksel tip bir enjeksiyon makinesi kullanılarak basılmıştır. Çalışma sonucunda, PA6 polimerine ilave edilen %8 oranındaki EPDM çekme mukavemetini %19.3, elastiklik modülünü %41.4 oranında azaltırken darbe mukavemetini %14.1 oranında artırmıştır. PA6 polimerine ilave edilen %10 oranındaki cam elyaf ise çekme mukavemetini %23.6, elastiklik modülünü %64.8 oranında artırırken darbe mukavemetini %63,4 oranında azaltmıştır. PA6 polimerine ilave edilen %10 oranındaki CE ise kompozitin eğilme mukavemeti ve eğilmedeki elastiklik modülünü sırasıyla %67.0 ve %94.0 oranlarında artırmıştır.

Anahtar Kelimeler

• PA6
• Cam elyaf
• EPDM
• Mekanik Özellikler

Kaynakça

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