Stoichiometric-architectural impact on thermo-mechanical and morphological behavior of segmented Polyurethane elastomers

The pliability of polymers is contingent on its architecture, decided by its stoichiometry, which is also an expedient way to ensure the anticipated characteristics in polymers. Four series of linear polyurethane elastomers, each comprised of seven samples are synthesized using hydroxyl terminated p...

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Bibliographic Details
Published in:Journal of polymer research 2021-07, Vol.28 (7), Article 238
Main Authors: Akram, Nadia, Saleem, Sundas, Zia, Khalid Mahmood, Saeed, Muhammad, Usman, Muhammad, Maqsood, Shumaila, Mumtaz, Nida, Khan, Waheed Gul, Hafiz-Ur-Rehman
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Elastomers
Ethane
Fourier transforms
Gravimetric analysis
Hexanes
Hydrogen bonding
Industrial Chemistry/Chemical Engineering
Industrial wastes
Morphology
Original Paper
Polymer Sciences
Polymers
Polyurethane resins
Segmentation
Stability analysis
Stoichiometry
Strain rate
Tensile strength
Thermal stability
Toluene
Toluene diisocyanates
Wastewater
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Summary:The pliability of polymers is contingent on its architecture, decided by its stoichiometry, which is also an expedient way to ensure the anticipated characteristics in polymers. Four series of linear polyurethane elastomers, each comprised of seven samples are synthesized using hydroxyl terminated polybutadiene as macrodiol, toluene diisocyanate and four different chain extenders: 1, 2 Ethane diol; 1, 4 Butane diol; 1, 6 Hexane diol and 1, 8 Octane diol. The functional linkages for the development of polymers have been confirmed via Fourier transform infrared spectroscopy. Hydrogen bonding index calculated from vibrational modes of C = O group are obtained in the range of 1.08–1.394. The thermal stability is observed up to 290 °C by thermal gravimetric analysis. Swelling behavior showed 50% of industrial waste water uptake. The true tensile strength is observed up to 8.48 MPa with 1,4 butane diol as chain extender. The secant modulus at 1% strain rate is found in the range of 0.30 to 12 MPA. The maximum value of toughness is observed as 3.26 J-mm −2 for 1,4 butane diol chain extender. Scanning electron microscopic analysis has revealed morphological phase segmentation based on composition.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-021-02566-2