Investigation of Role of both Nucleating Agent and Plasticizer on Physical, Mechanical and Thermal Properties of Poly(Lactic Acid)

Subject Areas : journal of New Materials

S. M. k. Fehri ¹ (دانشجوی دکتری پلیمر، دانشکده فنی و مهندسی - دانشگاه پیزا ایتالیا.)
S. M. Zebarjad ² (استاد، دانشکده مهندسی– دانشگاه شیراز ایران.)
A. Lazzeri ³ (استاد، دانشکده فنی و مهندسی - دانشگاه پیزا ایتالیا.)

Received: 2016-01-30 Accepted : 2016-01-30 Published : 2016-01-21

Keywords: Nucleating Agent, Plasticizer, Poly(Lactic Acid), Properties,

Abstract :

The role of a kind of plasticizer (OLA8) and two types of nucleating agents (LAK301 and PDLA) on the physical, mechanical and thermal behaviors of poly-lactic acid (PLA) were studied by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and tensile test. The results show that the OLA8 is an efficient plasticizer for PLA. this is because in the presence of 20wt% of OLA8 the elongation at break of PLA promoted. Also adding plasticizer to PLA causes to drop down both enthalpy and crystallinity unlike the presence of nucleating agent. For example the enthalpy and crystallization of a sample with composition of 20% OLA8-5%PDLA-2.8%LAK is half of than that of pure PLA. At constant plasticizer content, addition nucleating agents in different types and quantities causes to promote a little bit in enthalpy and crystallinity. in the presence of both plasticizer and nucleating agent (20%OLA8-5%PDLA-2.8%LAK) half time crystallization as 0.46″ min was recorded. In the same composition the glass transition temperature reduces 10˚C relation to pure PLA.

References:

 

References

1- D.Garlotta, A Literature Review of Poly(Lactic Acid), Polymers and the Environment Vol. 9, pp 63-84, 2001.

2- G. Cassanas, Vert M, Effects of Morphology, Conformation and Configuration on the IR and Raman Spectra of Various Poly(Lactic acid) Polymer Vol. 39(2), pp 267-273, 1998.

3- L. Lim, Processing Technologies for Poly(lactic acid) Polymer Science Vol.33, pp 820-852, 2008.

4-Natural Works^® Technology Focus Report: Blends of PLA with Other Thermoplastics, 2007.

5-F. Hassouna, New approach on the Development of Plasticized Polylactide (PLA): Grafting of poly(Ethylene Glycol) (PEG) Via Reactive Extrusion, European Polymer Journal Vol.47, pp 2134-2144 ,2011.

6- K. Halász, Plasticized Biodegradable Poly(lactic acid) Based Composites Containing Cellulose in Micro- and Nanosize, Hindawi Publishing Cooperation Journal of  Engineering : p 9, 2013.

7- B.Liu, Synergetic Effect of Dual Compatibilizers on in situ Formed poly (Lactic Acid)/soy protein Composites, Industry Engineering Chemistry Vol. 49, pp 6399-6406, 2010.

8- M. Rajeev, K. Vineet K., B. Haripada “Synthesis of Poly(Lactic Acid): A Review” Journal of Macromolecular Science, Part C: Polymer Reviews , Vol. 45, Issue 4, 2005

9- A.Huneault, Effect of Nucleation and Plasticization on the Crystallization of Poly(Lactic Acid), Polymer Vol.48, pp 6855-6866, 2007.

10- I. Sang, Effect of Biobased and Biodegradable Nucleating Agent on the Isothermal Crystallization of poly(lactic acid), Korean Journal of Chemistry and Engineering Vol. 25(3), pp 599-608, 2008.

11- X.Gao, A Mphiphilic Polylactic Acid-Hyperbranched Polyglycerol Nanoparticles as a Controlled release system for poorly Water-Soluble Drugs: Physicochemical Characterization, Pharmacy and Pharmacology Vol.63, pp 757-764, 2011.

12- G. McCrum, P. Buckley, and B. Bucknall, Principal of polymer engineering, second edition, Oxford Science Publications, New York, pp 117-128, 2006.

13- V. Klepko, Energy Dissipation and Modulus Defect in Heterogeneous Systems Based on Flexible-Chain linear Polymers, Vysokomolekulyarnye Soedineniya Ser B Vol.49-1, pp 139-143, 2007.

14- B. Suksut, Crystallization Behavior of Poly(Lactic Acid)/Titanium Dioxide Nanocomposites , Polymers and the Environment Vol. 19, pp 288-296, 2011

15 R.L. Shogren, W.M. Doane, D. Garlotta, J.W. Lawton, J.L. Willett,

Biodegradation of starch/polylactic Acid/Poly(Hydroxyester-Ether) Composite Bars in Soil, Polymer Degradation and Stability, Volume 79, Issue 3, Pages 405-411, 2003.

16- J. Muller, Isothermal Cold-Crystallization of PLA/PBAT Blends With and Without the Addition of Acetyl Tributyl Citrate Macromolecular Chemistry Physics Vol.213, pp 36-48, 2012.

17- B. Harte, An Overview of Polylactides as Packaging Materials Macromolecular Bioscience Vol. 4, pp 835-64, 2004.