Parası kalmadığı için otobüse binemiyordur ailesi porno izle ona daha yeni para gönderdiği için tekrar porno istemeye utanınca mecburen otostop çekmek için youporn çantasını alarak yol kenarına gelir etekli porno liseli türk kız yol kenarında dururken yanına yaklaşan porno kibar bir gencin onu gideceği yere kadar bırakmak porno izle istemesine çok mutlu olur arabaya bindiklerinde gideceği yer ile porno arabayı kullanan adamın gittiği yer arasında çok mesafe sex izle farkı olduğunu anlayan türk kız bu yaptığı porno indir iyilik karşısında arabada ona memelerini açar porno sapıklaşan adam yol kenarındaki hotelde durarak porno izle üniversiteli otostop çeken türk kızına odada sakso çektirip sikerSynthesis, Structural and Morphological Studies of Pine Cone Powder by Fenton Oxidation and Grafting With Acrylic Acid Using Ammonium Ceric Nitrate as Initiator| Abstract

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Abstract

Synthesis, Structural and Morphological Studies of Pine Cone Powder by Fenton Oxidation and Grafting With Acrylic Acid Using Ammonium Ceric Nitrate as Initiator

Author(s): Mabaso N, Naidoo B, Ofomaja A and Chiririwa H

Chemical grafting of acrylic acid onto pine cone powder was carried out using free radical initiation. Pre-treatment with Fenton oxidation was used for the removal of plant organic components an enhancement of the accessibility of cellulose for ceric ammonium nitrate initiator and monomer. The effects of temperature, monomer (Acrylic Acid), initiator (CAN), time, acid (HNO3) and mass of pine were investigated. The optimum conditions were 70°C, monomer ratio 7:10, initiator 1 g, Fenton pine cone powder 1 g, 0.9 mol/L HNO3 and time was 60 minutes. Acetone and tetrahydrofuran (THF) was used to remove homopolymer from the graft copolymer. A relatively high percentage of grafting was achieved when optimum reaction conditions were used. The Fenton pre-treatment of the pine cone powder before grafting provided hydroxyl radical, which improved grafting efficiency. Furthermore, the advantages of using CAN provided high grafting efficiency and lower amount of homopolymer formation. The grafted copolymer was characterized by FTIR, TGA, DSC, SEM, XRD and EDS analysis.


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