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Physical and mechanical properties of unsaturated polyester resin matrix from recycled PET (based PG ) with corn straw fiber
Author(s) -
Wilson García Nora Abigail,
Almaral Sánchez Jorge Luis,
Vargas Ortiz Ramón Álvaro,
Hurtado Macías Abel,
Flores Ramírez Nelly,
Aguilar Palazuelos Ernesto,
Flores Valenzuela Joaquín,
Castro Beltrán Andrés,
Alvarado Beltrán Clemente Guadalupe
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.51305
Subject(s) - flexural strength , ultimate tensile strength , hemicellulose , materials science , fiber , composite material , absorption of water , shore durometer , polyester , cellulose , young's modulus , polyethylene terephthalate , lignin , straw , chemistry , organic chemistry , inorganic chemistry
In this study, composites of unsaturated polyester resin (UPR), synthesized from recycled polyethylene terephthalate (PET), with 10 to 40% in volume of corn straw fiber (CSF), were elaborated and studied the effect of fiber content on their physical and mechanical properties. The content of cellulose (48.97%), hemicellulose (24.06%), and lignin (6.59%) were determined by chemical characterization of CSF. The characteristic bonds of the UPR were identified as a cross‐linking network between the styrene monomer (ST) and the unsaturated polyester (UP) through FTIR. Two decomposition stages were observed by TGA–DTG. The results of physical and mechanical properties showed that as the fiber content increased in the UPR, the water absorption increased (0.6% to 2.56%), on the other hand, the density (1218.23 to 1150.28 kg/m 3 ), flexural strength (50.58 to 26.98 MPa), flexural modulus (2.66 to 2.29 GPa), tensile strength (8.62 to 3.65 MPa), tensile modulus (1.18 to 0.43 GPa), and hardness (81.67 to 65.67 Shore D), they decreased. SEM analysis showed some defects in the fiber distribution in the UPR, which affected the mechanical properties of the composites. This research contributes to the development of new material from use of two waste materials for the benefit of the environment.