Properties of waterborne polyurethane films: effects of blend formulation with hydroxyl telechelic natural rubber and modified rubber seed oils |
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| Authors: | Anuwat Saetung Adisai Rungvichaniwat Phathanyaphon Tsupphayakorn-ake Pornsuda Bannob Tulyapong Tulyapituk Nitinart Saetung |
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| Affiliation: | 1.Department of Rubber Technology and Polymer Science, Faculty of Science and Technology,Prince of Songkla University,Pattani,Thailand;2.Department of Materials Science and Technology, Faculty of Science,Prince of Songkla University,Songkhla,Thailand |
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| Abstract: | A series of new waterborne polyurethanes (WPUs) was successfully prepared by the prepolymer process from the bio-renewable sources hydroxytelechelic natural rubber (HTNR with MW 3000 g mol?1) and hydroxylated rubber seed oil (HRSO), with DMPA fixed at 5.6 wt%. The effects of ratio of HTNR and HRSO (ranging from 1.00/0 to 0.10/0.90) and of hydroxyl value (OHV) of HRSO (200 or 270 mgKOH/g) on final properties were studied. It was found that the particle size of WPU increased significantly with both HRSO/HTNR ratio and OHV of HRSO. Chemical structure of the WPU films was confirmed by FT-IR. The water uptake, mechanical, dynamic mechanical properties and thermal stability of WPU film improved with both HRSO content and OHV of HRSO, while swelling in THF decreased. All these WPU films had similar Tg. This article reports novel green biobased WPU with promising applications as adhesive for shoe industries. |
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