INVESTIGADORES
CYRAS Viviana Paola
artículos
Título:
Influence of cooling conditions on the temperature and Crystallinity Profiles generated in a sisal fiber reinforced PCL/starch molded partV
Autor/es:
V. P. CYRAS; P. M. STEFANI; R. A. RUSECKAITE; A. VÁZQUEZ
Revista:
POLYMER COMPOSITES
Editorial:
Wiley
Referencias:
Año: 2004 vol. 25 p. 461 - 469
ISSN:
0272-8397
Resumen:
In this work, we performed the simulation of the temperature and relative degree
of crystallinity developed across the thickness of a sisal fiber reinforced-polycaprolactone/
starch (30%SF-PCL/S) molded part under different cooling conditions. The
non-isothermal kinetic model of Kamal and Chu (13) was used to predict the degree
of crystallinity profiles. In order to obtain the temperature profiles, the energy equation
was solved by treating the composite as a continuum using mass averaged physical
properties. The results indicated that for cooling at a constant wall temperature,
gradient-less crystallinity profiles for a wall temperature of 283 K and thicknesses
lower than 10 mm are obtained. On the other hand, when cooling at a constant cooling
rate, paired degree of crystallinity pieces can be obtained only for thicknesses
lower than 2 mm. The continuum numerical approach used herein has the ability of
predicting the optimal cooling cycle for manufacturing thick and crystallinity gradientless
SF-PCL/S parts.