Mechanical properties of polyurethane films prepared from liquefied wood with polymeric MDI

Kurimoto, Yasuji; Takeda, Masato; Koizumi, Akio; Yamauchi, Shigeru; S, Doi; Tamura, Y

doi:10.1016/s0960-8524(00)00009-2

Cited by 141 publications

(111 citation statements)

References 7 publications

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“…The conversion of biomass to useful polymers or composites has considerable economical and environmental value. With the rapid development of bio-based materials, more and more natural resources, such as vegetable oil [2,3], starch [4,5], soy protein [6] and cellulose [7] have been used as the renewable feedstock to produce polymeric materials. Furthermore, these polymers based on renewable resources have often possessed similar properties compared with their petroleum-based counterparts.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a bio-based epoxy with comparable properties to those of petroleum-based counterparts

Liu¹,

Huang²,

Jiang³

et al. 2012

Express Polym. Lett.

123

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Abstract. In this paper a bio-based epoxy with outstanding thermal and mechanical properties was synthesized using a rosin-based epoxy monomer and a rosin-based curing agent. The chemical structures of rosin based epoxy monomer and curing agent were confirmed by Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared (FT-IR) spectra. The flexural mechanical and dynamic mechanical properties as well as thermal stability of the cured epoxy were investigated. The results showed that the cured epoxy exhibited a glass transition temperature (T g ) of 164°C and its flexural strength and modulus were as high as 70 and 2200 MPa, respectively. This indicated that a wholly bio-based epoxy resin possessing high performance was successfully obtained.

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Section: Introductionmentioning

confidence: 99%

Preparation of a bio-based epoxy with comparable properties to those of petroleum-based counterparts

Liu¹,

Huang²,

Jiang³

et al. 2012

Express Polym. Lett.

123

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“…[1][2][3][4] In another liquefaction system, polyliquefied biomasses can be used to prepare polyurethane resins. [5][6][7][8] Epoxy resin is one of the most important resins and has been widely used for various industry products, such as adhesives, coatings and moldings. Many types of epoxy resins with different properties have been prepared.…”

Section: Introductionmentioning

confidence: 99%

Curing and thermal properties of copolymer epoxy resins prepared by copolymerized bisphenol-A and epichlorohydrin with liquefied Dendrocalamus latiflorus

Lee

2010

Polym J

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Dendrocalamus latiflorus Munro (ma bamboo) was liquefied in phenol or in polyethylene glycol/glycerol cosolvent, with H 2 SO 4 as a catalyst. The liquefied bamboo was reacted with bisphenol-A and epichlorohydrin to prepare copolymer epoxy resins. The thermal properties of resins during and after curing were investigated by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The results showed that a novel epoxy resin can be prepared by copolymerizing liquefied bamboo with bisphenol-A and epichlorohydrin in a two-step process. DSC analysis showed that the copolymer epoxy resins prepared with phenol-liquefied bamboo had a curing behavior similar to that of neat epoxy resin, even when 50% of the bisphenol-A was replaced with liquefied bamboo. However, the reactivity of copolymer epoxy resins prepared with polyhydric alcohol-liquefied bamboo decreased as the substitution amount of liquefied bamboo increased. DMA showed that the storage modulus and tan d of cured copolymer epoxy resins decreased as the amount of substituted liquefied bamboo increased.

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“…The absorption band at 1707 cm -1 was assigned to carbonyl groups (C=O) initially present in LW and hydrogenbonded carbonyl groups (Furer 2000;Mishra et al 2006) in urethane bonds, resulting from the reaction between hydroxyl groups in LW and the isocyanate hardener. The absorption bands at 3297 cm -1 , 1532 cm -1 ,and 1216 cm -1 , assigned to the stretching of N-H, bending of N-H with stretching of C-O-N (amide II) (Jena et al 2007), and stretching of C-N with bending of N-H (amide III), respectively, were also characteristic of urethane linkages (Hummel et al 1979;Kurimoto et al 2000). The formation of urea linkages was not seen.…”

Section: Pu Films Prepared From Lw and Lwbmentioning

confidence: 96%

“…The film-forming ability of such PU resins has also been reported . For instance, Kurimoto et al (2000Kurimoto et al ( , 2001Kurimoto et al ( , 2002 studied the mechanical and thermal properties and durability of PU films prepared from liquefied sugi (Cryptomeria japonica) with polymeric diphenylmethane diisocyanate (PMDI) as a function of the isocyanate/hydroxyl group (-NCO/-OH) ratio and of the dissolved wood content in the PU film. The primary objective of these investigations was to elucidate the role of the dissolved woody components in PU network structures.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Two-Component Polyurethane Coatings from Bleached Liquefied Wood

Cheumani-Yona

Budija²,

Hrastnik

et al. 2015

BioResources

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Liquefied wood-based polyurethane wood coatings of an aesthetically acceptable light colour were prepared and characterised. Liquefied black poplar wood was obtained by solvolysis in a polyethylene glycol/glycerol mixture, and it was bleached with hydrogen peroxide. The bleaching treatment converted liquefied wood from a dark brown to a yellowish product. Polyurethane films were prepared by the curing of liquefied wood with polymeric diphenylmethane diisocyanate or trimethylolpropane toluene diisocyanate prepolymer (TMP/TDI) isocyanate-type hardeners. It was found that the selected properties of the films prepared from the bleached liquefied wood were, in general, equivalent to those prepared from unbleached liquefied wood. The mechanical properties of the films obtained with the TMP/TDI curing agent were acceptable for wood coating applications. The initial poor resistance of the films to water and ethanol was substantially improved by the addition of n-octyltriethoxysilane to the liquefied wood prior to the preparation of the polyurethane coatings; the hardness of the films also increased.

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Mechanical properties of polyurethane films prepared from liquefied wood with polymeric MDI

Cited by 141 publications

References 7 publications

Preparation of a bio-based epoxy with comparable properties to those of petroleum-based counterparts

Preparation of a bio-based epoxy with comparable properties to those of petroleum-based counterparts

Curing and thermal properties of copolymer epoxy resins prepared by copolymerized bisphenol-A and epichlorohydrin with liquefied Dendrocalamus latiflorus

Preparation of Two-Component Polyurethane Coatings from Bleached Liquefied Wood

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