Oscillatory structure–property correlation in azelate polyols and thermoplastic polyurethanes

ABSTRACT Azelate polyols of 2000 g mol−1 have been successfully prepared via esterification of renewable azelaic acid with linear diols containing different number of CH2 repeating units. Structure–property correlation of the azelate polyols had been evaluated in thermoplastic polyurethanes (TPUs)....

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Bibliographic Details
Published in:Journal of applied polymer science 2018-05, Vol.135 (19), p.n/a
Main Authors: Tuan Ismail, Tuan Noor Maznee, Azowa Ibrahim, Nor, Sendijarevic, Aisa, Sendijarevic, Ibrahim, Schiffman, Christi M., Hoong, Seng Soi, Mohd Noor, Mohd Azmil, Poo Palam, Kosheela Devi, Yeong, Shoot Kian, Idris, Zainab, Abd. Malek, Emilia, Zainuddin, Norhazlin, Sendijarevic, Vahid
Format: Article
Language:English
Subjects:
biopolymers and renewable polymers
Diols
Esterification
Materials science
mechanical properties
Polymers
Polyols
polyurethane
Polyurethane resins
thermal properties
thermoplastics
Urethane thermoplastic elastomers
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Summary:ABSTRACT Azelate polyols of 2000 g mol−1 have been successfully prepared via esterification of renewable azelaic acid with linear diols containing different number of CH2 repeating units. Structure–property correlation of the azelate polyols had been evaluated in thermoplastic polyurethanes (TPUs). TPUs based on azelate polyols of longer chained linear diols with >4 CH2 repeat units retained higher degrees of crystallinity associated with the polyol soft segment. The ratio of hydrogen bonded urethane in the hard segment to free urethane phase mixed with the soft segment in the TPUs showed a complex oscillating dependence with increased number of CH2 repeating unit in the linear diols of azelate polyols. Correspondingly, static and dynamic properties of TPUs also showed the oscillatory dependence, whereby dynamic properties maximized with odd number of CH2 repeating unit and material strength maximized with even number of CH2 repeating unit. The results therefore can be used as guide to select appropriate azelate polyols to target specific TPU performance. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46258.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.46258