Polystyrene Composites Prepared with Polystyrene Grafted–fibers of Sugarcane Bagasse as Reinforcing Material
Arturo Zizumbo,*1 Angel Licea–Claveríe,1 Eder Lugo–Medina,2 Edgar García–Hernández,3 Domingo Madrigal1 and Roberto Zitzumbo4
1 Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Blv. Industrial S/N, C.P. 22500, Tijuana, B.C., México. *E–mail: azizumbo@tectijuana.mx
2 Depto. de Ingeniería Química, Instituto Tecnológico de los Mochis. Blvd. Juan de Dios Batíz y 20 de Noviembre, C.P. 81250, Los Mochis, Sinaloa, México.
3 Depto. de Ingeniería Química y Bioquímica, Instituto Tecnológico de Zacatepec, A.P. 45, C.P. 62780, Zacatepec, Morelos, México.
4 CIATEC, A.C. Omega 201 Fracc. Delta, C.P. 37545, León, Guanajuato, México.
]]>Received June 14, 2010.
Accepted December 6, 2010.
Abstract
Bagasse Fibers of sugarcane were modified with dichlo–romethylvinylsilane and consecutively grafted with polystyrene. For unmodified fibers, TGA showed two maximum decomposition peaks at 320°C and at 370°C. For silanized fibers, the most stable stage was shifted to a higher temperature of 470°C and to 510°C for silanized and polystyrene grafted fibers. Young moduli of composites increased from 1.9 GPa for non–treated fibers to 3.3 GPa for silanized and polystyrene grafted fibers.
Keywords: Recycling; polystyrene; natural fibers; sugarcane bagasse; composites.
Resumen
Las fibras de bagazo de caña se modificaron con diclorome–tilvinilsilano y se injertaron con poliestireno. Las fibras sin modificar mostraron en TGA dos picos máximos de descomposición a 320°C, y a 370°C. Para las fibras silanizadas, se observó un desplazamiento de la última etapa hacia mayores temperaturas a 470°C y hasta 510°C para las fibras injertadas con PS. Para los materiales compuestos, los módulos de Young se incrementaron desde 1.9 GPa para las fibras sin tratamiento hasta 3.3 GPa para las fibras silanizadas e injertadas.
]]> Palabras clave: Reciclado; poliestireno; fibra natural; bagazo de caña; materiales compuestos.
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Acknowledgments
Financial support by the following agencies is greatly acknowledged: DGEST (2475–P), and CONACYT (I32822–U). We thank specially Israel Gradilla of CNyN–UNAM for SEM–micrographs.
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