caa a22 4500 378903640 CHVBK 20180305123524.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.223 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.223 Kinetic considerations on the mechanical behaviour of polypropylene + wood flour and polypropylene + sisal fibre blends [Elektronische Daten] [Carmen Albano, Rebeca Poleo, Jacobo Reyes, Miren Ichazo, Jeanette González, María Brito] This work is aimed at analyzing by means of simple mathematical models the effect of different integral doses of γ-irradiation on the mechanical properties and concentration of radicals of the blends of polypropylene (PP) + wood flour and PP + sisal fibre. The analysis of the results permits inferring that the kinetic behaviour of the mechanical properties and the concentration of radicals at low integral doses (≤ 10 KGy) are indicative of a complex degradation process, implying the possibility of cross-linking and chain scission reactions both in the polymer as well as in the filler. Consequently, it can be concluded that cross-linking reactions are predominant. The behaviour observed at higher irradiation doses means that both reactions (cross-linking and chain scission) occur, the breaking reactions being the prevailing ones. This study of the kinetic analysis of the tensile properties is based on the behaviour detected for the melt-flow index. © 2013 by Walter de Gruyter GmbH & Co. Albano Carmen Laboratorio de Polímeros, Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Apdo 21827, Caracas 1020-A, Venezuela aut Poleo Rebeca Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química, Los Chaguaramos, P.O. Box 48146, Caracas 1041A, Venezuela aut Reyes Jacobo Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química, Los Chaguaramos, P.O. Box 48146, Caracas 1041A, Venezuela aut Ichazo Miren Universidad Simón Bolívar, Departamento de Mecánica, Caracas 1080A, Venezuela aut González Jeanette Universidad Simón Bolívar, Departamento de Mecánica, Caracas 1080A, Venezuela aut Brito María Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química, Los Chaguaramos, P.O. Box 48146, Caracas 1041A, Venezuela aut e-Polymers De Gruyter 4/1(2004-12-01), 223-233 2197-4586 4:1<223 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.223 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.223 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Albano Carmen Laboratorio de Polímeros, Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Apdo 21827, Caracas 1020-A, Venezuela aut NATIONALLICENCE 700 1- Poleo Rebeca Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química, Los Chaguaramos, P.O. Box 48146, Caracas 1041A, Venezuela aut NATIONALLICENCE 700 1- Reyes Jacobo Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química, Los Chaguaramos, P.O. Box 48146, Caracas 1041A, Venezuela aut NATIONALLICENCE 700 1- Ichazo Miren Universidad Simón Bolívar, Departamento de Mecánica, Caracas 1080A, Venezuela aut NATIONALLICENCE 700 1- González Jeanette Universidad Simón Bolívar, Departamento de Mecánica, Caracas 1080A, Venezuela aut NATIONALLICENCE 700 1- Brito María Universidad Central de Venezuela, Facultad de Ingeniería, Escuela de Ingeniería Química, Los Chaguaramos, P.O. Box 48146, Caracas 1041A, Venezuela aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 223-233 2197-4586 4:1<223 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter