Odun plastik kompozitlerden üretilen birleştirici elemanların mekanik özelliklerinin incelenmesi

xv, 84 sayfa: resim29 cm. 1 CDÖZETBu çalışmada, Aydın ilinde mobilya üretimi faaliyeti gösteren işletmelerden alınan atık (MDF, MDF Lam, Sunta, Sunta Lam) tozlarının 80 mesh‟lik eleklerde elenmesinden elde edilen odun unu ile polimer olarak atık plastik malzemelerden elde edilen polipropilen ve yüksek yoğunluklu polietilen (YYPE) farklı karışım oranlarında karıştırılmış, bağlayıcı ajan olarak maleik anhidrit grafted polietilen (MAPE) ve maleik anhidrit grafted polipropilen (MAPP) kullanılmıştır. Elde edilen karışım ile çift vidalı ekstruder makinesinde 200 0C‟de odun-plastik kompozit (OPK) elde edilerek kurutma işleminden sonra elde edilen OPK‟lar kırıcıdan geçirilerek peletler üretilmiştir. Üretilen pelletlerdeki odun unu oranı 10-50 Aralığında değişmektedir. Farklı karışım oranlarına sahip peletler, sıcak presleme tekniği ile 175-210 0C sıcaklık aralığında plastik enjeksiyon makinasında kalıplarda preslenerek OPKkavelalar üretilmiştir.ABSTRACTIn this study, wood flour obtained by sieving of waste powders(MDF, melamin coated MDF, Chipboard, Melamin coated chipboard) in 80 mesh sieve from the companies operating in furniture production in Aydın and polypropylene obtained from waste plastic materials as polymers and high density polyethylene (HDPE) is mixed in various mix proportions, maleic anhydride grafted polyethylene (MAPE) and maleic anhydride grafted polypropylene (MAPP) were used as binding agents. Wood-plastic composite (OPK) was obtained at 200 degrees in twin screw extrudermachine with the above mentioned mixture. After the drying process of the woodplastic composite (OPK), pellets are produced by passing through the crusher. The proportion of wood flour in the produced pellets varies between 10-50. OPK dowels were produced by pressing the pellets with different mixing ratios in the molds in the injection molding machine in the temperature range of 175-210 degrees with the help of hot pressing technique. In order to compare the moment bearing capacity of produced dowels with Fagus orientalis and commercial plastic dowel, 18 mm thick wood-based melamin coated particle board (YLL) and medium densityfiberboard (melamin coated MDF is used

An evaluation of the tourism-induced environmental Kuznets curve (T-EKC) hypothesis: Evidence from G7 countries

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This paper analyzes the legitimacy of the Environmental Kuznets Curve (EKC) hypothesis for a group of seven (G7) countries over the period 1995–2015. In addition to testing the EKC speculation, the authors also would like to understand the ways in which increases in renewable energy consumption and the international tourism receipt affect the CO2 emissions in G7 countries, because the energy and tourism sectors may have considerable direct impacts on CO2 emissions. In this investigation, a panel bootstrap cointegration test and an augmented mean group (AMG) estimator were applied. The empirical findings indicate that the tourism-induced EKC hypothesis is valid only for France. Additionally, it was detected that a rise in renewable energy consumption has a negative (reduction) impact on CO2 emissions in France, Italy, the UK, and the US. However, an increase in the receipt of international touristm has a positive (additional) impact on Italy’s CO2 emissions. Hence, this country’s decision-makers should re-review their tourism policy to adopt a renewable-inclusive one for sustainable tourism and the environment