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اثراصلاح گرمایی بر خواص کاربردی مواد مرکب آرد پوست-پلیپروپیلن | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 9، دوره 31، شماره 2 - شماره پیاپی 55، تیر 1395، صفحه 280-293 اصل مقاله (668.46 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2016.105775 | ||
| نویسندگان | ||
| قاسم اسدپور1؛ سید مجید ذبیح زاده1؛ مریم قربانی* 2؛ محمود داوودی3 | ||
| 1هیئت علمی دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 2هیات علمی- دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 3دانش آموخته کارشناسی ارشد، گروه مهندسی چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| چکیده | ||
| دراین تحقیق اثر اصلاح گرمایی پوست ممرز بر خواص کاربردی فرآورده مرکب آرد پوست- پلیپروپیلن موردبررسی قرار گرفت. چندسازه چوبپلاستیک به دو سطح شاهد و اصلاحگرمایی و هر سطح به چهار گروه نسبت پرکننده پوست 10، 20، 30 و 40 درصد تفکیک شدند. نمونههای آزمونی با استفاده از مالئیکانیدرید پیوند شده به پلیپروپیلن به عنوان عامل جفتکننده و به روش قالبگیری تزریقی تهیه گردیدند. بر اساس نتایج، آرد پوست موجب افزایش جذب آب، مدول کششی و خمشی گردید. نسبت بالای تقویتکننده پوست، افت مقاومتهای مکانیکی رابه همراهداشت. اصلاح گرمایی بهبود معنیداری در خواص فیزیکی و مکانیکی چندسازه ایجاد کرد. با استفاده از ماده لیگنوسلولزی آرد پوست ممرز، مدولکششی و مدولخمشی فرآورده مرکب بیشترین بهبود را داشتند. در بین خواص مکانیکی، مقاومت به ضربه در اثر افزودن آرد پوست بیشترین کاهش را داشت. اصلاح گرمایی با افزایش بلورینگی، تخریب همیسلولزها، کاهش قطبیت، افزایش سازگاری بین دو فاز چوبپلاستیک و توزیع یکنواخت پرکننده در زمینه پلیمر، مقاومتهای مکانیکی را افزایش داد. | ||
| کلیدواژهها | ||
| اصلاح گرمایی؛ مواد مرکب آرد پوست-پلیپروپیلن؛ خواص فیزیکی؛ مقاومت مکانیکی؛ ممرز | ||
| عنوان مقاله [English] | ||
| Effect of thermal modification on the practical properties of horn beam bark flour-polypropylene composites | ||
| نویسندگان [English] | ||
| ghasem asadpour1؛ seyyed majid zabihzadeh1؛ Maryam Ghorbani2؛ mahmoud davoudi3 | ||
| 1Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| 3M.sc graduated, Department of Wood and paper, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| چکیده [English] | ||
| Current research was conducted to investigate the effect of thermal modification on practical properties of horn beam bark flour-polypropylene composites. Wood plastic composites were divided in two levels of control and thermal modification, both levels included of 4 groups in bark fillers; 10, 20, 30 and 40%. Test samples prepared with maleic anhydride-grafted polypropylene as coupling agent by injection molding method. According to the results, bark flour increased water absorption, tensile and bending modulus. High proportion of bark fillers declined mechanical strength. Thermal modification significantly improved physical and mechanical properties of composite. Using lignocellulosic material flour bark hornbeam, tensile modulus and flexural modulus of composite material background had the highest improvement. In comparison between mechanical properties, impact resistance by adding flour bark had the greatest decrease. Thermal modification by increasing the crystallity, hemicellulose degradation, loss of polarity, increased compatibility between the two phases and uniform distribution of bark fillers in polymers, increased mechanical resistance. | ||
| کلیدواژهها [English] | ||
| Thermal modification, bark flour-polypropylene composites, physical properties, Mechanical strength, horn beam | ||
| مراجع | ||
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