Added value of lignin as lignin-based hybrid polyurethane for a compatibilizing agent

S. Ilmiati, J. Haris Mustafa, A. Yaumal, F. Hanum, Mochamad Chalid

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

As biomass-based material, lignin contains abundant hydroxyl groups promising to be used as chain extender in building hybrid polyurethanes. Consisting of polyehtylene glycol (PEG) content as hydrophobic part and lignin as hydrophilic part, the hybrid PU is expected to be as a novel compatibilizing agent in new materials production such as polyblends and composites. The hybrid PU was synthesized via two reaction stages, viz. pre-polyurethanization through reacting 4,4'-Methylenebis (Cyclohexyl Isocyanate) (HMDI) and PEG as polyol, and chain extention through adding lignin in the pre-polyurethanization system. The composition effect of lignin in hybrid PU syntehsis, to chemical structure corelated to hydrophobic to hydrophilic ratio, thermal and morphological properties, was evaluated by measuring NMR, FTIR, DSC, TGA and FE-SEM. The experiments showed that addition of lignin was able to extend the pre-polyurethane into hybrid polyurethane and to increase the lignin/polyol ratio in the hybrid polyurethanes, which were indicated by NMR and FTIR Analysis. And change of the ratio lead to increase the glass transition from 60.9 until 62.1°C and degradation temperature from 413.9 until 416.0°C. Observation of the morphology implied that addition of lignin gave more agglomerations. A Further investigation for this characterization study should be focused on a feasibility for this modified lignin as a novel compatibilizing agent.

Original languageEnglish
Article number012033
JournalIOP Conference Series: Materials Science and Engineering
Volume223
Issue number1
DOIs
Publication statusPublished - 5 Aug 2017
EventInternational Conference and Exhibition on Innovation in Polymer Science and Technology 2016, IPST 2016 - Medan, North Sumatera, Indonesia
Duration: 7 Nov 201610 Nov 2016

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