Abstract
Polyethylene Terephthalate’s (PET) properties are particularly sensitive to its processing history. Processing impacts the extent of crystallinity. Mechanical stretching and melt flow history influence the extent and structure of crystalline domains in the semi-crystalline polymer. Typical processing parameters include the rate of cooling and the amount of stretch. Both influence crystallization differently. Isolating the contribution from stretch or thermal crystallization is valuable for identifying the relationship to mechanical properties. In this work, the influence of thermal crystallinity on the mechanical behavior of PET was observed. Annealed injection molded samples with thermal crystallinity were tested Young’s modulus. Using the two-phase composite approach, mechanical behavior of injection molded semi-crystalline PET samples was modeled based on crystallinity from density. Crystallinity measured from different techniques did not always agree.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
Notes
- 1.
Using a Q-2000 system from TA Instruments.
References
Krevelen DWV, Nijenhuis KT (2009) Properties of polymers, 4th edn. Elsevier, Amsterdam
Bandla S (2010) Evaluation and stability of PET resin mechanical properties. MS, Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater
Halpin JC, Kardos JL (1972) Moduli of crystalline polymers employing composite theory. J Appl Phys 43:2235–2241
Andrews EH (1974) Morphology and mechanical properties in semicrystalline polymers. Pure Appl Chem 39:179–194
Breese DR, Beaucage G (2004) A review of modeling approaches for oriented semi-crystalline polymers. Curr Opin Solid State Mater Sci 8(12):439–448
Lee BJ, Parks DM, Ahzi S (1993) Micromechanical modeling of large plastic deformation and texture evolution in semi-crystalline polymers. J Mech Phys Solids 41(10):1651–1687
van Dommelen JAW, Parks DM, Boyce MC, Brekelmans WAM, Baaijens FPT (2003) Micromechanical modeling of the elasto-viscoplastic behavior of semi-crystalline polymers. J Mech Phys Solids 51(3):519–541
Patel J, Phillips PJ (1973) The Young’s modulus of polyethylene. J Polym Sci B 11:771–776
Viswanathan A, Wiff DR, Adams WW (1976) An investigation of structure-property correlation in polyethylene terephthalate films. Air Force Materials Laboratory, Wright-Patterson Air Force Base
Lyons WJ (1958) Theoretical values of the dynamic stretch moduli of fiber‐forming polymers. J Appl Phys 29:1429–1433
Ballou JW, Smith JC (1949) Dynamic measurements of polymer physical properties. J Appl Phys 20:493–502
Rastogi R, Vellinga WP, Rastogi S, Schick C, Meijer HEH (2004) The three-phase structure and mechanical properties of poly(ethylene terephthalate). J Polym Sci B Polym Phys 42:2092–2106
Gueguen O, Ahzi S, Makradi A, Belouettar S (2010) A new three-phase model to estimate the effective elastic properties of semi-crystalline polymers: application to PET. Mech Mater 42(1):1–10
Huyskens P, Groeninckx G, Vandevyvere P (1990) What rules the melting point of semi-crystalline polymers? Bulletin des Sociétés Chimiques Belges 99:1011–1017
Michler, G. H. (2008). Semicrystalline Polymers. Electron Microscopy of Polymers. H. Pasch. Germany, Springer Berlin Heidelberg: 295–327
Farrow G, Ward IM (1960) Crystallinity in poly (ethylene terephthalate): a comparison of X-ray, infra-red and density measurements. Polymer 1:330–339
Sudheer B, Masoud A,Jay C. Hanan. Out-of-plane orientation and crystallinity of biaxially stretched polyethylene terephthalate. Powder Diffraction, available on CJO2014. doi:10.1017/S0885715614000190
Bandla S, Hanan J (2012) Microstructure and elastic tensile behavior of polyethylene terephthalate–exfoliated graphene nanocomposites. J Mater Sci 47:876–882
Bandla S, Hanan JC (2012) Manufacturing tough amorphous thermoplastic-graphene nanocomposites. In: NanoTech, Santa Clara
de Daubeny RP, Bunn CW, Brown CJ (1954) The crystal structure of polyethylene terephthalate. Proc R Soc Lond A Math Phys Sci 226:531–542
Tong-yin Y, Hai-shan B, Jia-cong H, Wei Z, Qiao-ying G (1981) The double melting peaks of polyethylene terephthalate. Acta Polymerica Sinica 1:461–467
Mehta A, Gaur U, Wunderlich B (1978) Equilibrium melting parameters of poly(ethylene terephthalate). J Polym Sci B Polym Phys 16:289–296
Acknowledgments
This work was possible partially through OSU foundation grants to the Helmerich Research Center and industry sponsorship. Authors would like to acknowledge. Ovation Polymers for the injection molding of the tensile bars, and Dr. Ranji Vaidyanathan for use of the DSC Q-2000 system.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Bandla, S., Allahkarami, M., Hanan, J.C. (2015). Thermal Crystallinity and Mechanical Behavior of Polyethylene Terephthalate. In: Qi, H., et al. Challenges in Mechanics of Time-Dependent Materials, Volume 2. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-06980-7_17
Download citation
DOI: https://doi.org/10.1007/978-3-319-06980-7_17
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-06979-1
Online ISBN: 978-3-319-06980-7
eBook Packages: EngineeringEngineering (R0)