AHMET CAN, Baki HAZER, Hüseyin SİVRİKAYA

Kavak Odununun Benzofenon Tetrakarboksilik Di Metakrilatlarla Kimyasal Modifikasyonu

Çalışmanın amacı: Bu çalışmanın amacı, odun modifikasyon işleminde benzophenone tetracarboxylic di methacrylates maddesinin kullanımı ve kavak odununda meydana getirdiği değişimlerin incelenmesidir. Materyal ve yöntem: Kavak ağacı (Populus euramericana), 3,3,4,4-benzofenon tetrakarboksilik dianhidrit hidroksi etil (veya glisidil) metakrilat esterleri ile emprenye edilmiştir. Sıvı esterler, BTDA'nın hidroksi etil (veya glisidil) metakrilat ile reaksiyonu sonucu elde edilmiştir. Wood-BTD-H (ve BTD-G) etkileşimi, Fourier dönüşümü kızılötesi (FT-IR) spektroskopisindeki karakteristik sinyallerle incelendi. Modifiye edilmiş ahşabın mantar testi ve fiziksel özellikleri incelenmiştir. Sonuçlar: BDTA-H örnekleri, BDTA-G örneklerinden daha az renk değişikliği göstermiştir. Çürüme testinden önce, mini blok numuneleri Avrupa Standardizasyon Komitesi (EN 84, 1997) standardına göre yıkanma işlemine tabi tutulmuştur. Daha sonra kontrol ve modifiye edilmiş numuneler beyaz çürüklük mantarına (Trametes versicolor) maruz bırakılmıştır. BTD-G ile modifikasyon işlemi uygulanmış örneklerde yüksek oranda çürüklük direnci (% 68-72) sağlanmıştır. Önemli vurgular: Kimyasal maddenin polimerizasyonunda yüksek sıcaklık va basınca ihtiyaç duyulmadan sadece güneş ışınlarından yararlanılmıştır.

Anahtar Kelimeler:

Polimer Parçalanması, Hidroksietil Metakrilat Ester, Odun Modifikasyonu, FTIR Spektrumları

Chemical Modification of Poplar Wood with Benzophenone Tetracarboxylic Di Methacrylates

Aim of study: The aim of this study was to analyze the use of benzophenone tetracarboxylic di methacrylates material in wood modification process and the changes in poplar wood. Material and methods: Poplar wood (Populus euramericana) was impregnated with the hydroxyethyl (or glycidyl) methacrylate esters of 3,3,4,4-benzophenone tetracarboxylic dianhydride. The liquid esters were obtained by reaction of BTDA with hydroxy ethyl (BTD-H) (or glycidyl, BTD-G) methacrylate. The wood-BTD-H (and BTD-G) interaction was confirmed by the characteristic signals in Fourier-transform infrared (FT-IR) spectroscopy. The decay resistance and physical behaviour of the modified wood was investigated. Main results: The BDTA-H samples displayed less colour change than the BDTA-G samples. Before decay testing, mini-block samples were leached according to the European Committee for Standardization (EN 84 1997) standard, then control and modified samples were subjected to white-rot fungus (Trametes versicolor). Modification with BTD-G yielded a high improvement in decay resistance (68-72%). Highlights: In the esterification of the chemical, it is benefited only from the sun's rays without the need for high temperature and pressure.

Keywords:

Polymer Degradation, Hydroxy Ethyl Methacrylate Ester, Wood Modification, FT-IR Spectra,

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