فهرس المقالات Silica-Alumina حرية الوصول المقاله صفحة الملخص نص كامل 1 - Thermal and catalytic degradation study of polyethylene and investigation the catalytic effect of X-Zeolite and Silica-Alumina on degradation kinetic Mohammad Taghi Taghizadeh Parinaz Seifi-Aghjekohal Ali Bahadori, Banafsheh Zeraatkar