Compatibilization of water-soluble polyurethane/poly(lactic acid) blends upon addition of surface-modified CaCO3

In this study, bio-based poly(lactic acid) (PLA)/polycaprolactone (PCL) blends and PLA/PCL/silicon carbide (SiC) composites were prepared using a solution blending method. The surface of the SiC whiskers was modified using a silane coupling agent. The effects of the PCL and SiC contents on the flexural properties, fracture toughness, morphology of PLA/PCL blends, and PLA/PCL/SiC composites were investigated using several techniques. Both the fracture toughness and flexural strength of PLA increased by the introduction of PCL and were further improved by the formation of SiC whiskers. Fracture surfaces were observed by scanning electron microscopy, which showed that the use of PCL as a reinforcing agent induces plastic deformation in the PLA/PCL blends. The SiC whiskers absorbed external energy because of their good interfacial adhesion with the PLA matrix and through SiC-PLA debonding in the PLA/PCL/SiC composites.

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Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified Natural Fibers

Journal of Polymers and the Environment ◽

10.1007/s10924-018-1253-0 ◽

2018 ◽

Vol 26 (9) ◽

pp. 3785-3801 ◽

Cited By ~ 2

Author(s):

Rafael da Silva Araújo ◽

Maria de Fátima Vieira Marques ◽

Priscila Ferreira de Oliveira ◽

Claudinei Calado Rezende

Keyword(s):

Lactic Acid ◽

Natural Fibers ◽

Poly Lactic Acid ◽

Surface Modified

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Surface-modified halloysite nanotubes reinforced poly(lactic acid) for use in biodegradable coronary stents

Journal of Applied Polymer Science ◽

10.1002/app.46521 ◽

2018 ◽

Vol 135 (30) ◽

pp. 46521 ◽

Cited By ~ 8

Author(s):

Yuanyuan Chen ◽

Alan Murphy ◽

Dimitri Scholz ◽

Luke M. Geever ◽

John G. Lyons ◽

...

Keyword(s):

Lactic Acid ◽

Halloysite Nanotubes ◽

Coronary Stents ◽

Poly Lactic Acid ◽

Surface Modified

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Surface-Modified Cellulose Nanofibers-graft-poly(lactic acid)s Made by Ring-Opening Polymerization of l-Lactide

Journal of Polymers and the Environment ◽

10.1007/s10924-019-01398-y ◽

2019 ◽

Vol 27 (4) ◽

pp. 847-861 ◽

Cited By ~ 3

Author(s):

Chaniga Chuensangjun ◽

Kyohei Kanomata ◽

Takuya Kitaoka ◽

Yusuf Chisti ◽

Sarote Sirisansaneeyakul

Keyword(s):

Lactic Acid ◽

Ring Opening ◽

Cellulose Nanofibers ◽

Ring Opening Polymerization ◽

Poly Lactic Acid ◽

Surface Modified ◽

Modified Cellulose

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Morphology and Properties of Poly(Lactic Acid)/Ethylene-Octene Copolymer Blends with Different Organoclay Types

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.837.174 ◽

2020 ◽

Vol 837 ◽

pp. 174-180

Author(s):

Sirirat Wacharawichanant ◽

Attachai Sriwattana ◽

Kulaya Yaisoon ◽

Manop Phankokkruad

Keyword(s):

Thermal Stability ◽

Lactic Acid ◽

Poly Lactic Acid ◽

Mechanical And Thermal Properties ◽

Two Phase ◽

Copolymer Blends ◽

Ethylene Octene Copolymer ◽

Surface Modified ◽

Thermal Stability Of ◽

Observation Results

This work studied the morphology, mechanical and thermal properties of poly (lactic acid) (PLA)/ethylene-octene copolymer (EOC) (80/20) blends with different organoclay types. Herein, EOC was introduced to toughening PLA by melt blending and organoclay was used to improve compatibility and tensile properties of the blends. The two organoclay types were nanoclay surface modified with aminopropyltriethoxysilane 0.5-5 wt% and octadecylamine 15-35% (Clay-ASO) and nanoclay surface modified with dimethyl dialkyl (C14-C18) amine 35-45 wt% (Clay-DDA). The organoclay contents were 3, 5 and 7 phr. Scanning electron microscope (SEM) observation results revealed PLA/EOC blends demonstrated a two-phase separation of dispersed EOC phase and PLA matrix phase. The addition of organoclay significantly improved the compatibility between PLA and EOC phases due to EOC droplet size decreased dominantly in PLA matrix, so organoclay could act as an effective compatibilizer. The incorporation of organoclay increased significantly tensile strength of PLA/EOC/organoclay composites while Young’s modulus increased with 5 phr of organoclay. The thermal stability of PLA/EOC blends did not change when compared with neat PLA, and when added Clay-ASO in the blends could improve the thermal stability of the PLA/EOC blends.

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