Authors:P. V. Surse, S. Wagholikar, S. Mayadevi, and S. Sivasanker
reported, studies on anisole alkylation with C 6 hydrocarbons/alcohol are scarce. In this paper, we report the alkylation of anisole with 1-hexene and 1-hexanol (hexylalcohol) over zeolite H-beta. The influence of process parameters like temperature
For the enhancement of thermal stability of poly(p-dioxanone) (PPDO), the isocyanate end-capping reagent was prepared by treatment of toluene-2,4-diisocyanate with an equivalent
of 1-hexyl alcohol. The end-capping reagent and the end-capping PPDO with an inherent viscosity of 0.26 dL g−1 were characterized by FTIR and 1H-NMR. Thermal stability of the end-capping PPDO with an inherent viscosity of 0.92 dL g−1 was investigated isothermally and non-isothermally under air atmosphere using thermogravimetry. It has been shown that the
addition of the prepared isocyanate can enhance significantly the thermal stability of PPDO. The activation energies for non-isothermal
degradation estimated by Kissinger method and Friedman method are 91, 81 kJ mol−1 for as-prepared PPDO, and 160, 149 kJ mol−1 for the end-capping PPDO, respectively. The activation energy increases by about 70 kJ mol−1 through the end-capping.