Talk/EPDM/Polipropilen polimer kompozit köpük üretimi ve üretim şartlarının optimize edilmesi

Yıl 2022, Cilt: 12 Sayı: 3, 864 - 876, 15.07.2022

Salih Hakan Yetgin Hüseyin Ünal

https://doi.org/10.17714/gumusfenbil.1041296

Öz

Bu çalışmada, talk ve etilen-propilen-dien-monomer (EPDM) katkılı polipropilen (T-EPDM-PP) kompozit köpüklerin hücre yapısı ve mekanik özelliklerine enjeksiyon proses şartlarının etkisi incelenmiştir. Enjeksiyon basıncı, geri besleme basıncı, enjeksiyon hızı ve ergiyik sıcaklığı gibi farklı proses şartları kullanılmıştır. Mekanik özellikleri belirlemek için ise çekme testi ve darbe testi gerçekleştirilmiştir. Mekanik özelliklerin karşılaştırılabilmesi için köpüklendirilmemiş T-EPDM-PP polimer kompozit numuneleri de üretilmiştir. Elde edilen deneysel veriler Taguchi metodu kullanılarak analiz edilmiştir. Köpüklerin hücre morfolojisi, farklı proses şartlarına bağlı olarak, steromikroskop kullanarak kabuk tabakası kalınlığı (KTK), hücre boyutu ve hücre yoğunluğu açısından incelenmiştir. Enjeksiyon basıncı (E.B), enjeksiyon hızı (E.H) ve ergiyik sıcaklığı (E.S)’nın artması ile köpük numunelerin çekme ve darbe dayanımları azalırken geri besleme basıncının artması ile artmıştır. Kabuk tabakası kalınlığının artması ile kompozit köpüğün çekme ve darbe dayanımları artmıştır. Artan E.B ve enjeksiyon hızlarında hücre boyutu azalmıştır. Yüksek enjeksiyon basıncı ve enjeksiyon hızı ile birlikte düşük geri besleme basıncı ve ergiyik sıcaklığı kullanıldığında yüksek hücre yoğunluğu elde edilmiştir. Artan E.B, E.H ve E.S ile köpük yoğunluğu azalmıştır. T-EPDM-PP esaslı kompozit köpük üretiminde yüksek çekme ve darbe dayanımı elde etmek için optimum proses parametreleri olarak geri besleme basıncı 100 bar, ergiyik sıcaklığı 160 oC, enjeksiyon hızı 60 mm/s ve enjeksiyon basıncı 60 bar olarak tespit edilmiştir.

Anahtar Kelimeler

Enjeksiyon köpük kalıplama, Köpük morfolojisi, PP, EPDM, Talk, Taguchi analizi

Destekleyen Kurum

Kütahya Dumlupınar Üniversitesi

Proje Numarası

2014-84

Teşekkür

Bu çalışma, Kütahya Dumlupınar Üniversitesi Bilimsel Araştırma Projeleri tarafından desteklenmiştir. (Proje No: 2014-84). Yazarlar desteklerinden dolayı teşekkürü bir borç bilir.

Production of Talc/EPDM/Polypropylene polymer composite foam and optimizing production conditions

Öz

The effect of injection process conditions on the cell structure and mechanical properties of talc and ethylene-propylene-diene-monomer (EPDM) filled polypropylene (T-EPDM-PP) composite foams was investigated. Different process conditions such as injection pressure, feedback pressure, injection speed and melting temperature were used. Tensile test and impact test were performed to determine the mechanical properties of the foam materials. In order to compare the mechanical properties, unfomed T-EPDM-PP polymer composite samples were also produced. Obtained experimental data were analyzed using the Taguchi method. The cell morphology of the foams was investigated in terms of skin layer thickness, cell size and cell density using a stereomicroscope, depending on different process conditions. With the increase of injection pressure, injection speed and melting temperature, the tensile and impact strengths of foam samples decreased, while it increased with the increase of the feedback pressure. The tensile and impact strengths of the composite foam increased with the increase in skin layer thickness. Cell size decreased with increasing E.B and EB. High cell density was obtained when low feedback pressure and melting temperature were used together with high injection pressure and injection speed. Foam density decreased with increasing E.B, E.H and E.S. In order to obtain high tensile and impact strength in T-EPDM-PP based composite foam production, optimum process parameters were determined as feedback pressure 100 bar, melting temperature 160 oC, injection speed 60 mm/s and injection pressure 60 bar.

Anahtar Kelimeler

Injection foam molding, Foam morphology, PP, EPDM, Talc, Taguchi analysis

Proje Numarası

2014-84

Kaynakça

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