The effect of moisture present in polymers on their X-ray diffraction patterns

Structural, Thermal and Electrical Properties of Doped Poly(3,4 ethylenedioxythiophene)

Poly(3,4-ethylenedioxythiophene) (PEDOT) was chemically synthesized, undoped and then re-doped using FeCl3 as well as camphorsulfonic acid (CSA). FT-IR results confirm the nature of the synthesized and doped samples. XRD analysis indicates crystal structure modification after doping and was also used to calculate crystallinity of samples. Crystallinity increases after FeCl3 doping, whereas it reduces due to CSA doping. TGA-DTA results show reduction in Tg value for FeCl3 doped sample while it increases for CSA doped samples compared to that of undoped PEDOT. Reduction in Tg indicates plasticizing effect of FeCl3 whereas increase in Tg show anti-plasticizing effect of CSA in PEDOT. Conductivity value () increases by two orders of magnitude after doping. Log vs. 1/T graph show metallic nature of undoped PEDOT above 308 K, however both doped samples show semiconducting nature from 301 to 383 K.

Effect of TEOS plasma polymerization on corn starch/poly(ε-caprolactone) film: characterization, properties and biodegradation

An improvement in the barrier properties of biopolymer CSPCL films was achieved without affecting the biodegradability, using plasma polymerization techniques.

H. Raisoni College of Engineering, 440 016 Nagpur, India, Kelkar D, Peshwe D, Department of Physics, Institute of Science, 440 001 Nagpur, India, Material Engineering Centre, Visvesvaraya National Institute of Technology, 440 011 Nagpur, India. Impact of Conducting Polymer Filler on the Dielectric Properties of Nylon 11

The dielectric studies of semi-crystalline Nylon 11 filled with a conducting polymer (PANI) were investigated in a wide range of frequency and temperature by using Impedance Analyzer. The main focus was on the effects of conducting filler content on dielectric properties of Nylon 11. The prominent factors such as dielectric permittivity, loss factor, and loss tangent were studied at high frequency. Two different concentrations (1 % and 5 % w/w) of the conducting filler were used. It was observed that with the increase of fillers concentration, the value of dielectric permittivity (ε’)б The dissipation factor (ε’’) and loss (tan ) decrease compared to pure Nylon 11.

Vincent Pallotti College of Engineering and Technology, Nagpur-441 108, India, Deepali K, Department of Physics, Institute of Science, Civil Lines, Nagpur, Applied Physics Department, St. Vincent Pallotti College of Engineering and Technology, Nagpur-441 108, India. Synthesis of polyaniline in presence of low magnetic field, its structure and electrical properties

Polyaniline is synthesized chemically under the influence of low magnetic field of intensity 1KGauss. The effect of magnetic field during the synthesis process causes enhancement of electrical conductivity by two orders of magnitude. This increased electrical conductivity depends on the polymer chain ordering, as well as structure and morphology of the reported polymer.