Preparation, Performance, and Kinetics of Poly(Lactic‐Acid)/Amidated Benzoic Acid Intercalated Layered Double Hydroxides Nanocomposites by Reactive Extrusion Process

2018 ◽  
Vol 40 (7) ◽  
pp. 2668-2680 ◽  
Author(s):  
Zhongxing Geng ◽  
Weijun Zhen
Keyword(s):  
Lactic Acid ◽  
Benzoic Acid ◽  
Layered Double Hydroxides ◽  
Reactive Extrusion ◽  
Extrusion Process ◽  
Poly Lactic Acid ◽  
Double Hydroxides ◽  
Kinetics Of ◽  
Reactive Extrusion Process

scholarly journals Poly(Lactic Acid)-Based Nanobiocomposites with Modulated Degradation Rates

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1943 ◽  
Author(s):  
Iozzino Valentina ◽  
Askanian Haroutioun ◽  
Leroux Fabrice ◽  
Verney Vincent ◽  
Pantani Roberto
Keyword(s):  
Lactic Acid ◽  
Succinic Acid ◽  
Extrusion Process ◽  
Poly Lactic Acid ◽  
Melt Compounding ◽  
Degradation Rates ◽  
Rate Of Hydrolysis ◽  
Plastic Industry ◽  
Double Hydroxides ◽  
Kinetics Of

In the field of biodegradable polymers such as poly(Lactic Acid) (PLA), it is quite well known that their kinetics of hydrolysis strongly depend on the pH of the hydrolyzing medium. The idea explored during this study focused on PLA, is the addition of additives that are able to control the pH of water when it diffuses inside the polymer. For instance, acids (i.e. succinic acid, also used as food additive) are bio- and eco- friendly additives that are able to play this role. In order to control the release of these molecules and their dispersion inside the polymer, their intercalation in biocompatible nanofillers like layered double hydroxides (LDH) is here considered. The additives have been dispersed in the polymer by melt compounding, commonly used in the plastic industry. Several composites of PLA (4032D) and LDH intercalated with organic acids (succinic, fumaric, and ascorbic acid) have been obtained by an extrusion process. From all extruded materials, PLA films obtained by compression molding were then subjected to hydrolysis tests. The results showed that the mentioned molecules, dispersed in the polymer, are able to control the rate of hydrolysis, and experimental results show an increase of degradation time for samples containing LDH-organic acid (in particular with LDH-succinic acid), making such hybrid additives an appropriate and efficient solution for PLA.

scholarly journals Modelling and Validation of Synthesis of Poly Lactic Acid Using an Alternative Energy Source through a Continuous Reactive Extrusion Process

Polymers ◽  
2016 ◽  
Vol 8 (4) ◽  
pp. 164 ◽  
Author(s):  
Satya Dubey ◽  
Hrushikesh Abhyankar ◽  
Veronica Marchante ◽  
James Brighton ◽  
Kim Blackburn ◽  
...  
Keyword(s):  
Energy Source ◽  
Lactic Acid ◽  
Alternative Energy ◽  
Reactive Extrusion ◽  
Extrusion Process ◽  
Poly Lactic Acid ◽  
Alternative Energy Source ◽  
Reactive Extrusion Process

scholarly journals Development of Toughened Flax Fiber Reinforced Composites. Modification of Poly(Lactic Acid)/Poly(Butylene Adipate-Co-terephthalate) Blends by Reactive Extrusion Process

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1523
Author(s):  
Jacek Andrzejewski ◽  
Michał Nowakowski
Keyword(s):  
Lactic Acid ◽  
Mechanical Test ◽  
Reactive Extrusion ◽  
Extrusion Process ◽  
Flax Fiber ◽  
Poly Lactic Acid ◽  
Reinforced Composites ◽  
Structure Evaluation ◽  
The Impact ◽  
Reactive Extrusion Process

The presented study focuses on the development of flax fiber (FF) reinforced composites prepared with the use of poly(lactic acid)/poly(butylene adipate-co-terephthalate)—PLA/PBAT blend system. This type of modification was aimed to increase impact properties of PLA-based composites, which are usually characterized by high brittleness. The PLA/PBAT blends preparation was carried out using melt blending technique, while part of the samples was prepared by reactive extrusion process with the addition of chain extender (CE) in the form of epoxy-functionalized oligomer. The properties of unreinforced blends was evaluated using injection molded samples. The composite samples were prepared by compression molding technique, while flax fibers reinforcement was in the form of plain fabric. The properties of the laminated sheets were investigated during mechanical test measurements (tensile, flexural, impact). Differential scanning calorimetry (DSC) analysis was used to determine the thermal properties, while dynamic mechanical thermal analysis (DMTA) and heat deflection temperature (HDT) measurements were conducted in order to measure the thermomechanical properties. Research procedure was supplemented with structure evaluation using scanning electron microscopy (SEM) analysis. The comparative study reveals that the properties of PLA/PBAT-based composites were more favorable, especially in the context of impact resistance improvement. However, for CE modified samples also the modulus and strength was improved. Structural observations after the impact tests confirmed the presence of the plastic deformation of PLA/PBAT matrix, which confirmed the favorable properties of the developed materials. The use of PBAT phase as the impact modifier strongly reduced the PLA brittleness, while the reactive extrusion process improves the fiber-matrix interactions leading to higher stiffness and strength.

scholarly journals Synthesis and characterization of MgAl-DBS LDH/PLA composite by sonication-assisted masterbatch (SAM) melt mixing method

RSC Advances ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 658-667 ◽  
Author(s):  
Roger Quispe-Dominguez ◽  
Sajid Naseem ◽  
Andreas Leuteritz ◽  
Ines Kuehnert
Keyword(s):  
Lactic Acid ◽  
Layered Double Hydroxides ◽  
Research Work ◽  
Synthesis And Characterization ◽  
Poly Lactic Acid ◽  
Melt Mixing ◽  
Dodecylbenzene Sulfonate ◽  
Mixing Method ◽  
Double Hydroxides

This research work is based on the comparison of the mixing phenomena of magnesium–aluminum (MgAl) layered double hydroxides (LDHs) intercalated by dodecylbenzene sulfonate (MgAl-DBS) in poly(lactic acid) (PLA).

Kinetics of the thermal degradation of poly(lactic acid) obtained by reactive extrusion: Influence of the addition of montmorillonite nanoparticles

2015 ◽  
Vol 48 ◽  
pp. 69-81 ◽  
Author(s):  
F. Carrasco ◽  
O. Santana ◽  
J. Cailloux ◽  
M.Ll. Maspoch
Keyword(s):  
Lactic Acid ◽  
Thermal Degradation ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Kinetics Of
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