Quasi-static behavior of palm-based elastomeric polyurethane: For strengthening application of structures under impulsive loadings

H. M. Chandima Chathuranga Somarathna, Sudharshan Naidu Raman, Khairiah Badri, Azrul A Mutalib, Damith Mohotti, Sri Devi Ravana

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In recent years, attention has been focused on elastomeric polymers as a potential retrofitting material considering their capability in contributing towards the impact resistance of various structural elements. A comprehensive understanding of the behavior and the morphology of this material are essential to propose an effective and feasible alternative to existing structural strengthening and retrofitting materials. This article presents the findings obtained from a series of experimental investigations to characterize the physical, mechanical, chemical and thermal behavior of eight types of palm-based polyurethane (PU) elastomers, which were synthesized from the reaction between palm kernel oil-based monoester polyol (PKO-p) and 4,4-diphenylmethane diisocyanate (MDI) with polyethylene glycol (PEG) as the plasticizer via pre-polymerization. Fourier transform infrared (FT-IR) spectroscopy analysis was conducted to examine the functional groups in PU systems. Mechanical and physical behavior was studied with focus on elongation, stresses, modulus, energy absorption and dissipation, and load dispersion capacities by conducting hardness, tensile, flexural, Izod impact, and differential scanning calorimetry tests. Experimental results suggest that the palm-based PU has positive effects as a strengthening and retrofitting material against dynamic impulsive loadings both in terms of energy absorption and dissipation, and load dispersion. In addition, among all PUs with different plasticizer contents, PU2 to PU8 (which contain 2% to 8% (w/w) PEG with respect to PKO-p content) show the best correlation with mechanical response under quasi-static conditions focusing on energy absorption and dissipation and load dispersion characteristics.

Original languageEnglish
Article number202
JournalPolymers
Volume8
Issue number5
DOIs
Publication statusPublished - 2016

Fingerprint

Polyurethanes
Retrofitting
Energy absorption
Plasticizers
Energy dissipation
Palm oil
Polyols
Polyethylene glycols
Elastomers
Impact resistance
Functional groups
Fourier transform infrared spectroscopy
Elongation
Differential scanning calorimetry
Loads (forces)
Polymers
Hardness
Polymerization
elastomeric
palm oil

Keywords

  • Elastomer
  • Impulsive loadings
  • Palm-based polyurethane
  • Quasi-static
  • Retrofitting
  • Trengthening

ASJC Scopus subject areas

  • Polymers and Plastics
  • Chemistry(all)

Cite this

Quasi-static behavior of palm-based elastomeric polyurethane : For strengthening application of structures under impulsive loadings. / Chandima Chathuranga Somarathna, H. M.; Raman, Sudharshan Naidu; Badri, Khairiah; A Mutalib, Azrul; Mohotti, Damith; Ravana, Sri Devi.

In: Polymers, Vol. 8, No. 5, 202, 2016.

Research output: Contribution to journalArticle

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