Compatibility improvement of poly(lactic acid)/thermoplastic polyurethane blends with 3-aminopropyl triethoxysilane

2015 ◽  
Vol 132 (30) ◽  
pp. n/a-n/a ◽  
Author(s):  
Sun-Mou Lai ◽  
Yu-Chi Lan ◽  
Wan-Ling Wu ◽  
Yu-Jhen Wang
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid

Composites of poly(lactic) acid/thermoplastic polyurethane/mica with compatibilizer: morphology, miscibility and interphase

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 98915-98924 ◽  
Author(s):  
Shikui Jia ◽  
Zhong Wang ◽  
Yan Zhu ◽  
LiGui Chen ◽  
Lei Fu
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid

Relationship between mechanical properties and morphology of poly(lactic) acid (PLA)/thermoplastic polyurethane (TPU)/mica composites.

Effects of thermoplastic polyurethane on the properties of poly(lactic acid)/organo-montmorillonite nanocomposites based on novel vane extruder

2013 ◽  
Vol 54 (10) ◽  
pp. 2292-2300 ◽  
Author(s):  
Shikui Jia ◽  
Jinping Qu ◽  
Rongyuan Chen ◽  
Chengran Wu ◽  
Zan Huang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid ◽  
Montmorillonite Nanocomposites

Effect of Thermoplastic Polyurethane-Modified Silica on Melt-Blended Poly(Lactic Acid) (PLA) Nanocomposites

2017 ◽  
Vol 25 (8) ◽  
pp. 583-592 ◽  
Author(s):  
Sun-Mou Lai ◽  
Pei-Wen Li
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Optical Transmittance ◽  
Poly Lactic Acid ◽  
Modified Silica ◽  
Moulding Process ◽  
Fast Processing ◽  
Unmodified Silica ◽  
Silica Dispersion ◽  
Surface Modified

3-aminopropyltriethoxysilane (APTES) was used as a coupling agent to graft thermoplastic polyurethane (TPU) onto a nanosilica surface. The modification of TPU on the surface of silica nanoparticles was confirmed by FTIR, NMR, ESCA and TGA assessment. The grafting degree of TPU onto the silica was about 7.3%. The incorporation of surface-modified silica (TAS50) into poly(lactic acid) (PLA) induced the nucleation of PLA, giving a higher crystallisation peak temperature, which would be advantageous for fast processing cycles in the commercial moulding process. With pristine silica incorporated into PLA, the variation in the cold crystallisation and melting temperatures was limited. However, for the surface-modified silica filled PLA, a lower cold crystallisation temperature at 112.1 °C and a shift of melting temperature from Tm1 to Tm2 at 167.7 °C were observed. The cooling rate also played an essential role in the derived crystalline forms. The tensile strength of the composite containing modified silica was slightly higher than that with the pristine silica, even though both showed similar degrees of silica dispersion from the morphology observation. For the surface-modified silica composite, the optical transmittance was higher than that of unmodified silica case. This finding implies the significance of the surface modification.

scholarly journals Influence of clay-nanofiller geometry on the structure and properties of poly(lactic acid)/thermoplastic polyurethane nanocomposites

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30755-30762 ◽  
Author(s):  
I. Kelnar ◽  
J. Kratochvíl ◽  
I. Fortelný ◽  
L. Kaprálková ◽  
A. Zhigunov ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Polymer System ◽  
Poly Lactic Acid ◽  
Structure And Properties ◽  
Complex Effect ◽  
Polyurethane Nanocomposites

The complex effect of platy and tubular nanofillers on the performance of a biodegradable multiphase polymer system is presented.

Toughened poly(lactic acid)/thermoplastic polyurethane uncompatibilized blends

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Mateus Garcia Rodolfo ◽  
Lidiane Cristina Costa ◽  
Juliano Marini
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Impact Resistance ◽  
Nucleating Agent ◽  
Poly Lactic Acid ◽  
Immiscible Blends ◽  
The Matrix ◽  
Dispersed Phases ◽  
Internal Mixer ◽  
Toughening Agent

Abstract Poly(lactic acid), PLA, is a biodegradable polymer obtained from renewable sources with similar properties when compared with petroleum-based thermoplastics but with inherent brittleness. In this work, the use of thermoplastic polyurethane (TPU) as toughening agent was evaluated. PLA/TPU blends with 25 and 50 wt% of TPU were produced in an internal mixer without the use of compatibilizers. Their thermal, rheological, and mechanical properties were analyzed and correlated with the developed morphology. Immiscible blends with dispersed droplets morphology were obtained, and it was observed an inversion between the matrix and dispersed phases with the increase of the TPU content. The presence of TPU altered the elasticity and viscosity of the blends when compared to PLA, besides acting as a nucleating agent. Huge increments in impact resistance (up to 365%) were achieved, indicating a great potential of TPU to be used as a PLA toughening agent.

scholarly journals Fabrication, Characterization, and Cytotoxicity of Thermoplastic Polyurethane/Poly(lactic acid) Material Using Human Adipose Derived Mesenchymal Stromal Stem Cells (hASCs)

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1073 ◽  
Author(s):  
Anna Lis-Bartos ◽  
Agnieszka Smieszek ◽  
Kinga Frańczyk ◽  
Krzysztof Marycz
Keyword(s):  
Tissue Engineering ◽  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Tensile Tests ◽  
In Vitro Assays ◽  
Poly Lactic Acid ◽  
Scanning Calorimetry ◽  
Casting Technique ◽  
Wide Range

Thermoplastic polyurethane (TPU) and poly(lactic acid) are types of biocompatible and degradable synthetic polymers required for biomedical applications. Physically blended (TPU+PLA) tissue engineering matrices were produced via solvent casting technique. The following types of polymer blend were prepared: (TPU+PLA) 7:3, (TPU+PLA) 6:4, (TPU+PLA) 4:6, and (TPU+PLA) 3:7. Various methods were employed to characterize the properties of these polymers: surface properties such as morphology (scanning electron microscopy), wettability (goniometry), and roughness (profilometric analysis). Analyses of hydrophilic and hydrophobic properties, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) of the obtained polymer blends were conducted. Tensile tests demonstrated that the blends exhibited a wide range of mechanical properties. Cytotoxicity of polymers was tested using human multipotent stromal cells derived from adipose tissue (hASC). In vitro assays revealed that (TPU+PLA) 3:7 matrices were the most cytocompatible biomaterials. Cells cultured on (TPU+PLA) 3:7 had proper morphology, growth pattern, and were distinguished by increased proliferative and metabolic activity. Additionally, it appeared that (TPU+PLA) 3:7 biomaterials showed antiapoptotic properties. hASC cultured on these matrices had reduced expression of Bax-α and increased expression of Bcl-2. This study demonstrated the feasibility of producing a biocompatible scaffold form based on (TPU+PLA) blends that have potential to be applied in tissue engineering.

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