The CPCs present low water uptake and thickness swelling variation.
The use of coupling agent based on maleic anhydride or by adding suberin or lignin further reduces considerably the water uptake of the composites.
The thermal properties showed that lignin can act as a thermal protective agent and suberin act as an antioxdant agent on the composites, while the PE-g-MA act as both.
Coupling agents obtained from renewable resources may constitute a viable alternative to existing petroleum derivatives, contributing for a sustainable development of structural materials.