This research endeavor aimed to develop thin film blends of polypyrrole (PPy) and poly (styrene-isoprene-styrene) (SIS) with MoO3 as a nanofiller for improved mechanical and electrical properties to widen its scope in the field of mechatronics. This study reports blends of polypyrrole (PPy) and poly (styrene-isoprene-styrene) (SIS) tri-block copolymer showing improved mechanical and electrical attributes while employing MoO3 nanobelts as nanofillers that additionally improves the abovementioned properties in the ensuing nanocomposites. The synthesis of PPy/SIS blends and MoO3/PPy/SIS nanocomposites was well corroborated with XRD, SEM, FTIR, and EDS analysis. Successful blending of PPy was yielded up to 15 w/w% PPy in SIS, as beyond this self-agglomeration of PPy was observed. The results showed a remarkable increase in the conductivity of insulating SIS copolymer from 1.5 × 10−6.1 to 0.343 Scm−1 and tensile strength up to 8.5 MPa with the 15 w/w% PPy/SIS blend. A further enhancement of the properties was recorded by embedding MoO3 nanobelts with varying concentrations of the nanofillers into 15 w/w% PPy/SIS blends. The mechanical strength of the polymeric nanocomposites was enhanced up to 11.4 MPa with an increase in conductivity up to 1.51 Scm−1 for 3 w/w% MoO3/PPy-SIS blends. The resultant product exhibited good potential for electro-mechanical dual applications.
The interference of different electromagnetic waves is considered a major concern in the current era. Various materials serve as potential candidates for shielding, but polymer composites have gained attention due to their superior properties. Polymer composites of poly(styrene-isoprene-styrene) (SIS) and polyaniline (PANI) are prepared with the help of solvent casting technique to study electromagnetic interference shielding effectiveness. To study the properties of these blends, different techniques were utilized, including FTIR, SEM, XRD. With the help of a conductivity test, the composites have shown improvement in electrical conductivity up to 1.18 Scm À 1 . Electromagnetic interference shielding effectiveness was measured within the X-band by using a vector network analyzer (VNA). The results observed showed an increase in attenuation up to 16dB upon optimum polyaniline concentration. The interaction and dispersion rate of filler is regarded as the primary aspect for enhanced properties. However, the agglomeration caused due to higher content of polyaniline resulted in decreased properties, i. e., 20 wt. % polyaniline.
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