Effect of sodium dodecyl sulfate on mechanical and thermal properties of polypropylene/chitosan composites

Abstract

The effect of sodium dodecyl sulfate (SDS) on mechanical and thermal properties of chitosan-filled polypropylene (PP) composites was investigated. Mechanical and thermal properties of PP/chitosan composites were analyzed according to ASTM D 638-91, thermogravimetry analysis and differential scanning calorimetry, respectively. Results showed that the treated PP/chitosan composites had higher tensile strength and Young's modulus when compared with untreated PP/chitosan composites, but lower in elongation at break in the same filler loading. Thermal analysis results showed that the thermal stability and degree of crystallinity of treated PP/chitosan composites were higher than untreated ones. Scanning electron microscopy and Fourier transform infrared studies revealed less detachment of filler from matrix on the tensile surface of treated PP/chitosan composites as an evidence of enhanced interfacial adhesion between filler and matrix due to the formation of covalent bonding between chitosan and SDS.

Effect of different filler content of ABS–zinc ferrite composites on mechanical, electrical and thermal conductivity by using 3D printing

“…Amri et al also stated the Young's modulus indicates the stiffness of composite materials and depends on the filler loading . Their finding shows the stiffness of polypropylene/chitosan composites indicate stronger at the higher filler loading . This finding reveals that the increasing rigidity of treated PP/chitosan composites with sodium dodecyl sulfate (SDS) because of better interfacial adhesion in the composite systems .…”

“…This occurred due to a strong reinforcement effect and caused the presence of the coupling agent which promotes adhesion between the filler phases and matrix . Amri et al also stated the Young's modulus indicates the stiffness of composite materials and depends on the filler loading . Their finding shows the stiffness of polypropylene/chitosan composites indicate stronger at the higher filler loading .…”

“…The elongation at break of composites decreases when the filler loading increased because of the deformation of the filler is generally much less than the polymer matrix and it will cause the filler forces the matrix to deform more than the overall deformation of the composites . Amri et al reported that the increase in filler loading decreases significantly the elongation at break of untreated and treated PP/chitosan composites because of the formation of rigid interface between PP matrix and chitosan that block the mobility of PP molecular chain leading to the loss of flexibility of PP matrix . Shahdan et al also stated the increasing of nickel zinc ferrite filler in polylactic acid (PLA) matrix decreased the elongation at break results caused the tensile stress increases but at the same time the tensile strain of composites decreased .…”

An Experimental Study of Photocatalytic Degradation of Congo Red Using Polymer Nanocomposite Films

“…Figure 3 shows the FT-IR spectra of the polymers and the prepared nanocomposite films, and Table 1 summarizes their spectral data. e IR characteristics of the original chitosan are 3448, 2925, 2369, 1655, 1405, and 1077 cm −1 , assigned to O-H stretching overlapped with N-H stretching, aliphatic C-H stretching, in plane N-H bending, C-O stretching vibration of primary alcoholic group [16,17], and stretching vibration of hydroxy group ( [18,19] cited in [17]), respectively. ese values are shifted to 3425, 2924, 2370, 1546, 1406, and 1069 cm −1 of the Chit/C film, whereas the IR characteristics of the original PVA are 3404, 2926 and 2369, 1656, 1433, 1095, and 670 cm −1 assigned to O-H stretching, CH 2 asymmetric and symmetric stretching, C-O stretching, C-H bending, and C-H outside the plan bond, respectively [20], shifted to 3400, 2935, 2370, 1437, 1092, and 669 cm −1 , respectively, of the film of PVA/C owing to incorporation of the carbon particles with the polymers.…”

Chemically Chitosan Modified With Methyl Methacrylate and Its Effect on Mechanical and Thermal Properties of Polypropylene Composites

“…Salmah et al [21] reported that the interfacial adhesion between chitosan and PP matrix was significantly enhanced by employing the 3-aminopropyltriethoxysilane (3-APE) as the chemical modifying agent in composite systems. In addition, in our previous work we have reported that better interfacial bonding and higher tensile strength of chitosan filled polypropylene (PP) composites were obtained by chemically treating the chitosan with sodium dodecyl sulfate [22].…”