Details
| Original language | English |
|---|---|
| Pages (from-to) | 103-110 |
| Number of pages | 8 |
| Journal | Materials chemistry and physics |
| Volume | 134 |
| Issue number | 1 |
| Publication status | Published - 15 May 2012 |
| Externally published | Yes |
Abstract
The synthesis of EVA-g-PLA grafted copolymers was carried out by reactive extrusion, through transesterification reaction between ethylene vinyl acetate copolymer (EVA) and polylactide (PLA), using titanium propoxide (Ti(OPr) 4) and titanium phenoxide (Ti(OPh) 4) as catalysts. Different materials were prepared by changing the relative amount of polylactide and catalyst. The extent of the grafting reaction, which depends on the quantity of polylactide and catalysts, was estimated by selective extractions. The influence of the same parameters on the final structure, morphology and thermal and mechanical properties was also evaluated. The results showed that Ti(OPr) 4 exhibited higher efficiency as a catalyst than Ti(OPh) 4. Moreover, using the former catalyst, 25 wt.% of EVA-g-PLA copolymer was synthesized. The sample containing the higher amount of copolymer exhibits the better properties and the higher biodegradability.
Keywords
- Biodegradable, Ethylene vinyl acetate, Grafting, Polylactide, Transesterification
ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Materials chemistry and physics, Vol. 134, No. 1, 15.05.2012, p. 103-110.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Synthesis of EVA-g-PLA copolymers using transesterification reactions
AU - Moura, I.
AU - Nogueira, R.
AU - Bounor-Legare, Véronique
AU - MacHado, A. V.
N1 - Funding Information: The authors acknowledge the financial support given by FCT through the project PTDC/AMB/73854/2006 and the PhD grant SFRH/BD/29802/2006 .
PY - 2012/5/15
Y1 - 2012/5/15
N2 - The synthesis of EVA-g-PLA grafted copolymers was carried out by reactive extrusion, through transesterification reaction between ethylene vinyl acetate copolymer (EVA) and polylactide (PLA), using titanium propoxide (Ti(OPr) 4) and titanium phenoxide (Ti(OPh) 4) as catalysts. Different materials were prepared by changing the relative amount of polylactide and catalyst. The extent of the grafting reaction, which depends on the quantity of polylactide and catalysts, was estimated by selective extractions. The influence of the same parameters on the final structure, morphology and thermal and mechanical properties was also evaluated. The results showed that Ti(OPr) 4 exhibited higher efficiency as a catalyst than Ti(OPh) 4. Moreover, using the former catalyst, 25 wt.% of EVA-g-PLA copolymer was synthesized. The sample containing the higher amount of copolymer exhibits the better properties and the higher biodegradability.
AB - The synthesis of EVA-g-PLA grafted copolymers was carried out by reactive extrusion, through transesterification reaction between ethylene vinyl acetate copolymer (EVA) and polylactide (PLA), using titanium propoxide (Ti(OPr) 4) and titanium phenoxide (Ti(OPh) 4) as catalysts. Different materials were prepared by changing the relative amount of polylactide and catalyst. The extent of the grafting reaction, which depends on the quantity of polylactide and catalysts, was estimated by selective extractions. The influence of the same parameters on the final structure, morphology and thermal and mechanical properties was also evaluated. The results showed that Ti(OPr) 4 exhibited higher efficiency as a catalyst than Ti(OPh) 4. Moreover, using the former catalyst, 25 wt.% of EVA-g-PLA copolymer was synthesized. The sample containing the higher amount of copolymer exhibits the better properties and the higher biodegradability.
KW - Biodegradable
KW - Ethylene vinyl acetate
KW - Grafting
KW - Polylactide
KW - Transesterification
UR - http://www.scopus.com/inward/record.url?scp=84860244014&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2012.02.036
DO - 10.1016/j.matchemphys.2012.02.036
M3 - Article
AN - SCOPUS:84860244014
VL - 134
SP - 103
EP - 110
JO - Materials chemistry and physics
JF - Materials chemistry and physics
SN - 0254-0584
IS - 1
ER -