CRUZ, W.B.B.; http://lattes.cnpq.br/5176074208639734; CRUZ, Waldir Barreto Belfort da.
Résumé:
Industry shows a great interest in studying polymer blends as a means of cheap and
efficient modification of mechanical properties of polymeric systems. Criterious choice
of blends components allows one to ajust its properties to specific purporses.
Conventional plasticizes used with PVC tend to migrate, exude and volatize during
processing and use, which causes a decrease on the final properties of the product. In
order to minimize this problem the performance of polymeric additives has been
investigated.
In this work, mechanical and rheological properties, as well as the compatibility
of plastified PVC/EVA blends with EVA contents varying from 0 - 1 3 % wt/wt were
investigated. The effects of varying VAc contents (20 - 60%) as well as the molecular
weight of the EVA copolymer properties were also determined.
Our results show that the compatibility, processability and mechanical properties
of plasticized PVC ( PVC* ) / EVA blends could be improved by employing EVA
copolymers with high vynil acetatye (VAc) contents.