Novel DCPD-modified polyester containing epoxy groups: thermal,viscoelastic, and mechanical properties of their wood flour filled copolymers |
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Authors: | Marta Worzakowska |
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Affiliation: | (1) Department of Polymer Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, Gliniana 33 Street, 20-614 Lublin, Poland |
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Abstract: | In this article, the synthesis of novel DCPD-modified polyesters containing epoxy groups and their possible utilization as
polar matrices for wood flour filled copolymers have been studied. The novel DCPD-modified polyester containing epoxy groups
was prepared during three-step process. First, the addition reaction of maleic acid to DCPD norbonenyl double bond has been
performed. Then, the polyesterification of acidic ester of DCPD, cyclohex-4-ene dicarboxylic anhydride, and ethylene glycol
(ethane-1,2-diol, EG) or neopentyl glycol (2,2-dimethyl-1,3-propanediol, NP) in the presence of catalyst was carried out using
melt condensation technique. Finally, the oxidation process of prepared DCPD-modified polyesters led to obtain DCPD-modified
polyesters containing epoxy groups. The structural characterization of prepared DCPD-modified polyesters containing epoxy
functionality has been carried out using FTIR and HNMR spectroscopic methods. The thermal, viscoelastic, and mechanical properties
of their unfilled and wood flour filled copolymers have been studied by DSC, DMA, TGA analyses, three-point bending test,
and Brinell’s hardness. The performed investigations indicated that novel DCPD-modified polyesters containing epoxy groups
can be successfully applied as polar matrices for preparation wood flour filled copolymers due to their “compatibility” with
hydrophilic wood flour surface which resulted with stronger interactions between wood and polymer surface and thus producing
copolymers which were characterized by improved thermo-mechanical properties compared to unfilled copolymers. |
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