This study reports a one‐pot process used to synthesize poly[(linoleic acid)‐g‐(styrene)‐g‐(ε‐caprolactone)] (PLina‐g‐PSt‐g‐PCL) graft copolymers. The process was carried out by combining the atom transfer radical polymerization of styrene with the ring‐opening polymerization of ε‐caprolactone from polymeric linoleic acid having hydroxyl groups and bromine groups in the main chain. The characterization of the products was achieved using proton nuclear magnetic resonance, size‐exclusion chromatography, Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry techniques. Subsequently, an organic field effect transistor (OFET) was fabricated with PLina‐g‐PSt‐g‐PCL graft copolymers as the insulator layer. Poly(3‐hexylthiophene) (P3HT) was used as the active layer and prepatterned OFET substrates were used as the welding/discharge electrodes. To measure capacitance, an ITO/P3HT/PLina‐g‐PSt‐g‐PCL/Al structure was prepared using the same method. To obtain output and transfer current–voltage characteristics, electrical characterizations of OFET devices were conducted in darkness and an atmosphere of air. From a capacitance–frequency plot, the key characteristics of the devices, including the threshold voltage (VTh), field effect mobility, and current on/off ratio (Ion/off), were derived. The fundamental electrical parameters in the fabricated OFET devices based on styrene concentration were thoroughly examined. It was observed that the produced PLina‐g‐PSt‐g‐PCL OFETs display positive device characteristics such as low VTh, exceptional mobility, and Ion/off values. © 2023 The Authors. Polymer International published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry.
Highlights: Graphical/TabularAbstract Measurement of mechanical properties of PP /PET blends Improving mechanical properties Morphological characteristics of PP /PET blends When the morphology and mechanical properties of PP / PET mixtures are examined, it is seen that there is a more homogenized structure in PP +%30PET sample in SEM images. In PP + %40 PET mixture, the transition from droplet to fibril form appears more clearly. In PP +%50 PET mixture, homogeneity started to deteriorate again and gaps started to form again in structure it was observed that Young's modulus reached 2653.79 MPa in PP +%40 PET sample, and an increase of about 210% compared to pure PP. Figure A. SEM images of PP / PET mixtures and Young modulus change Purpose: In this study, the dynamic-mechanical and spectroscopic properties of PP / PET polymer blends with different ratios have been investigated experimentally and the effect of PET additive on dynamic-mechanical and spectroscopic properties has been tried to be explained. Theory and Methods: In this study, tensile test of PP and PET blends were tested at a drawing speed of 25 mm/min and at different ambient temperatures. SEM analyzes were performed and DMA tests used to determine the viscoelastic properties of PP / PET mixtures were performed at a frequency of 1 Hz from 30°C to 120°C with a temperature increase of 2,00 ° C / min. For structure characterization of PP / PET mixtures, FTIR analyzes were performed between 4000-650 cm-1. It was compared with the characteristic peaks of pure materials to see the interactions of PP / PET blend films. Results: It is observed that mechanical properties reaches its maximum value for all temperatures at 40% PET. There is a structural phase transition and matrix structure changes in the PP + 50% PET sample. Because PET and PP ratios are equal For this reason, it was observed that Young's modulus values decreased in comparison to PP + 40% PET in this example.SEM images also support this view. Conclusion: In this study, the effect of PET additives on the mechanical properties of PP, instead of glass fiber, was investigated especially for plastic pipe manufacturing., and it was concluded that the best mechanical properties were PP + 40% PET
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