Year: 2008
Type: article
Abstract: The thermal stability and kinetics of non-isothermal degradation of polypropene and polypropene composites filled with 20 mass% vigorously grounded and mixed raw rice husks (RRH), black rice husks ash (BRHA), white rice husks ash (WRHA) and Aerosil Degussa (AR) were studied.The calculation procedures of Madhysudanan et al., Tang et al., Wanjun et al. and 27 model kinetic equations were used.The kinetics of thermal degradation were found to be best described by kinetic equations of n-th order (Fn mechanism).The kinetic parameters E, A, ΔS ≠ , ΔH ≠ and ΔG ≠ for all the samples studied were calculated.The highest values of n, E and A were obtained for the composites filled with WRHA and AR.A linear dependence between lnA and E was observed, known also as kinetic compensation effect.The results obtained were considered enough to conclude that the cheap RRH and the products of its thermal degradation BRHA and WRHA, after vigorously grounding and mixing, could successfully be used as fillers for polypropene instead of the much more expensive synthetic material Aerosil to prepare various polypropene composites.
Source: eXPRESS Polymer Letters
Institution: Prof. Assen Zlatarov University
Language: English
Topic: Thermal and Kinetic Analysis
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2028595456