期刊
MACROMOLECULAR MATERIALS AND ENGINEERING
卷 307, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.202200360
关键词
biobased materials; dibutyl itaconate; injection molding; plasticizers; polylactide
资金
- MCIN/AEI [FPU19/01759, FPU20/01732, PID2020-116496RB-C22]
- ESF Investing in your future
- Generalitat Valenciana-GVA [ACIF/2021/185, AICO/2021/025]
This study reports on the use of DBI as an environmentally friendly plasticizer for PLA, and the results show that the plasticized PLA formulation with 10 wt% DBI offers the most balanced overall properties, while the formulations with 15 and 20 wt% DBI have lower performance.
This work reports on the use of dibutyl itaconate (DBI) as an environmentally friendly plasticizer for polylactide (PLA) with different proportions of DBI in the 2.5-20 wt% (weight content) range. A co-rotating twin-screw extrusion process followed by injection molding is employed for the manufacturing of the samples. The results show that the plasticized PLA formulation with 10 wt% DBI offers the most balanced overall properties, with a noticeable increase in the elongation at break from 4.6% (neat PLA) up to 322%, with a tensile modulus of 1572 MPa, and a tensile strength of 23.8 MPa. In the case of 15 and 20 wt% DBI formulations, PLA reaches the saturation point with no more increase in the elongation at break and a clear decrease in the tensile modulus. DBI also decreases the glass transition temperature (T-g) from 61.3 degrees C (neat PLA) down to 23.4 degrees C for plasticized PLA formulation containing 20 wt% DBI, thus showing the high plasticization efficiency of DBI.
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