Mechanical properties of virgin and recycled polyolefin-based composite laminates reinforced with jute fabric

Abstract

Polyolefin‐based composite laminates reinforced with jute fabric were prepared by compression molding and investigated in terms of flexural properties and impact behavior. The use of a virgin polypropylene as the matrix was compared with two polyolefin matrices coming from discarded car bumpers and selected packaging wastes, respectively, and mainly constituted by mixtures of polyethylene and polypropylene resins. The influence of a coupling agent (maleated polypropylene) was always considered in order to improve the interfacial adhesion and, consequently, the composite strength. The effect of this coupling agent, clearly dependent on the amount of polypropylene phase in the overall mixture, was found to be satisfactory only in the case of virgin polypropylene‐based systems. These latter, in presence of maleated polypropylene, have shown higher flexural parameters, lower propagation energy and higher breaking impact load with respect to uncompatibilized ones. Results were supported by morphological observations of impact surfaces, always highlighting a poor adhesion at the reinforcement–matrix interface except in compatibilized virgin polypropylene‐based laminates. POLYM. COMPOS., 36:2022–2029, 2015. © 2014 Society of Plastics Engineer

Comparison of falling dart and Charpy impacts performances of compatibilized and not compatibilized polypropylene/woven glass fibres composites

“…However, it is difficult to relate the absorbed energy of a specimen to that of an actual structural component given their complex failure mode combining different mechanisms as delamination, fibre debonding, fibre breaking and so on. Russo et al [14] investigated the effect of the coupling agent on the mechanical behaviour of jute fibres/polypropylene composites. The authors showed that the inclusion of the compatibilizer increases the impact initiation energy and Charpy breaking load.…”

The role of polypropylene matrix in cyclic bending coupled thermal effects

“…In particular, the first three specimens are made of only the basic matrix, which is polypropylene (PP grade MA712 from Unipetrol—Czech Republic with MFI = 12 g/10 min), either neat or modified with the addition of a given percentage (2% or 5% by weight) of a common coupling agent, polypropylene‐grafted maleic anhydride (PP‐g‐MA) that is commercialized under the trade name of Polybond 3200 (MFI 115 g/10 min, 1 wt% maleic anhydride, from Chemtura). The following are specimens reinforced with either glass or jute fibers; more specifically, plain weave type woven glass fabric (E‐type glass fibers having density of 2.54 g/cm 3 ) with a specific mass of 204 g/m 2 , or jute plain weave type fabric with a specific mass of 250 g/m 2 and furnished by Deyute (Alicante, Spain) . All specimens are 25 mm wide and L = 125 mm long.…”

Saman Takviyeli Yüksek Yoğunluklu Polietilen Kompozitlerin Mekanik Özellikleri ve Su Emme Kapasitelerindeki Değişimlerin İncelenmesi

“…Doğal lifleri, polimerlerde (termoplastik ve termoset) takviye malzemeleri olarak kullanarak, ham maddelerin nihai bertarafı ve iyi çevresel faydalara sahip yeşil malzemeler üretmek mümkündür. Bu nedenle, son birkaç yılda, kompozitlerde geleneksel sentetik liflerin doğal liflerle değiştirilmesinin fizibilitesini araştıran bazı çalışmalar yapılmıştır [4][5][6][7]. Ayrıca, tüketimin her geçen gün artması ile günümüzde sürdürülebilir ürünlerin kullanılmasına büyük bir ihtiyaç vardır [8][9][10].…”