Effects of Mixing Protocols on Impact Modified Poly(lactic acid) Layered Silicate Nanocomposites

Date

2015-02-20

Author

Baouz, Touffik
Acik, Eda
Rezgui, Farouk
Yılmazer, Ülkü

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

112
views

0
downloads

Poly(lactic acid)/2 wt % organomodified montmorillonite (PLA/OMMT) was toughened by an ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) rubber. The ternary nanocomposites were prepared by melt compounding in a twin screw extruder using four different addition protocols of the components of the nanocomposite and varying the rubber content in the range of 5-20 wt %. It was found that both clay dispersion and morphology were influenced by the blending method as detected by X-ray diffraction (XRD) and observed by TEM and scanning electron microscopy (SEM). The XRD results, which were also confirmed by TEM observations, demonstrated that the OMMT dispersed better in PLA than in E-MA-GMA. All formulations exhibited intercalated/partially exfoliated structure with the best clay dispersion achieved when the clay was first mixed with PLA before the rubber was added. According to SEM, the blends were immiscible and exhibited fine dispersion of the rubber in the PLA with differences in the mean particle sizes that depended on the addition order. Balanced stiffness-toughness was observed at 10 wt % rubber content in the compounds without significant sacrifice of the strength. High impact toughness was attained when PLA was first mixed with the clay before the rubber was added, and the highest tensile toughness was obtained when PLA was first compounded with the rubber, and then clay was incorporated into the mixture. Thermal characterization by DSC confirmed the immiscibility of the blends, but in general, the thermal parameters and the degree of crystallinity of the PLA were not affected by the preparation procedure. Both the clay and the rubber decreased the crystallization temperature of the PLA by acting as nucleating agents. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41518.

Subject Keywords

Mixing protocol, Nanocomposite, Organoclay, Poly lactic acid, Rubber toughening

URI

https://hdl.handle.net/11511/56510

Journal

JOURNAL OF APPLIED POLYMER SCIENCE

DOI

https://doi.org/10.1002/app.41518

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Ethylene-methyl acrylate-glycidyl methacrylate toughened poly(lactic acid) nanocomposites Baouz, Touffik; Rezgui, Farouk; Yılmazer, Ülkü (2013-06-05) Poly (lactic acid) (PLA) was melt blended in a twin screw extruder using an ethylene-methyl acrylate-glycidyl methacrylate rubber as a toughener. PLA/rubber blends were immiscible as observed by scanning electron microscopy. Impact strength and ductility of PLA were improved by the addition of the rubber at the expense of strength and stiffness. An organo-montmorillonite (OMMT) was used at 2 wt % to counteract the negative effect of the rubber on modulus, and balanced properties were observed at 10 wt % rub...
Effects of fluorination and thermal shock on the photocatalytic activity of Bi2O3 nanopowders Bouzıanı, Asmae; Park, Jongee; Öztürk, Abdullah (2021-10-05) Fluorinated Bi2O3 (F-Bi2O3) nanopowder was prepared via fluorination followed by thermal shock of α-Bi2O3 nanopowder. The XRD, FTIR, SEM, and DRS characterization techniques were employed to investigate the effects of fluorine (F) insertion into the α-Bi2O3 host and the thermal shock from different temperatures. The crystal structure, optical and photocatalytic properties of the F-Bi2O3 nanopowders prepared were researched. The XRD results confirmed the substitution of O2- with F-. The FTIR results revealed...
Effect of Different Syrup Types on Turkish Delights (Lokum): A TD-NMR Relaxometry Study Pocan, Pelin; Grunin, Leonid; Öztop, Halil Mecit (2022-12-16) Turkish delights were formulated by using sucrose (control) and different types of corn syrups (having varying glucose/fructose ratios) and allulose syrup. 30% allulose syrup and 30% sucrose-containing Turkish delights were found to exhibit an amorphous structure. Time-domain NMR relaxometry experiments were also conducted on delights by measuring T2 relaxation times, and two distinct proton populations were observed in all formulations. The use of different syrup types at different substitution levels led ...
Effect of side chain variation on surface and biological properties of poly(2-alkyl-2-oxazoline) multilayers Çağlı, Eda; Ugur, Esma; Ulusan, Sinem; Banerjee, Sreeparna; Erel Göktepe, İrem (Elsevier BV, 2019-05-01) Multilayers of poly(2-alkyl-2-oxazoline)s (PAOX) with varying side chains were constructed through layer-by-layer (LbL) self-assembly using Tannic Acid (TA). Surface morphology, stability, wettability and stimuli-responsive drug release properties of the films were correlated with antiadhesive and antibacterial properties of the multilayers. Thickness, roughness, wettability and stability of multilayers were affected by the chemical nature of PAOX side chain, phase behaviour of PAOX and the binding strength...
Use of purified and modified bentonites in linear low-density polyethylene/organoclay/compatibilizer nanocomposites Seyidoglu, Tijen; Yılmazer, Ülkü (2012-05-05) Polyethylene-based ternary nanocomposites were prepared with different clay structures, obtained by the modification of purified Resadiye bentonite as the reinforcement, a random terpolymer of ethylene, butyl acrylate, and maleic anhydride with the trade name Lotader3210 as the compatibilizer, and linear low-density polyethylene (LLDPE) as the polymer matrix in an intensive batch mixer. The quaternary ammonium/phosphonium salts used for the modification of bentonite were dimethyldioctadecyl ammonium (DMDA) ...

Citation Formats

T. Baouz, E. Acik, F. Rezgui, and Ü. Yılmazer, “Effects of Mixing Protocols on Impact Modified Poly(lactic acid) Layered Silicate Nanocomposites,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 0–0, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56510.