چكيده به لاتين
In this project graft polymerization of methyl methacrylate (MMA), butyl acrylate (BA) and 2-hydroxyethyl methacrylatete (HEMA) monomers on chicken feather fibers using redox system potassium persulfate (K2S2O8) / sodium bi sulfit ( NaHSO3) is done, at first the best ratio of two monomers MMA and BA were selected, then MMA, BA and HEMA monomers were grafted on the fibers with fixed ratio of MMA / BA and various amounts of HEMA. The occurrence of grafting using Fourier transform infrared spectroscopy (FTIR) was approved. The results of Differential scanning calorimetry (DSC) showed that the curve of the modified fibers has a temperature of about 140 °C which is the melting curve while the curve related to unmodified fibers showed no melting curve and in results of Thermogravimetric analysis (TGA), it was observed that the modified fibers at a temperature of 220 °C started destroying, while this process for unmodified fibers started from 208°C but heat destruction curve of modified samples and unmodified fibers showed the same behavior. Modified fibers used for preparing films by means of compression molding without glycrol and with various amount of glycrol, the films which preapared with glycrol were transparent and homogeneous while the films without glycrol have cracks on their surface. In best situation Young's modulus, tensile strength and elongation at breack have amounts of 19.04 GPa, 118 MPa and 0.8% respectively compared with results of sampels without 2-hydroxyethyl methacrylate Young's modulus, tensile strength increased about 100% and 500 % respectively while elongation at breack decreased about 75%. The amount of thermal conductivity 0.039 W / (m.K) for the films obtained from the modified fibers were measured, which is decreased 15% in compare with unmodified feather.Scanning electron microscope (SEM) pictures confirmed grafting of monomers on fiber's surface and fiber's nodes, also in films which is containing glycrol fibers were dispersed hemogenously while the films without glycrol fibers were destroyed and they have cracks on their surface.
