Polyurethane polyester elastomer: Innovative environmental friendly wood adhesive from modified PETs and hydroxyl liquid natural rubber polyols

Phetphaisit, Chor. Wayakron; Bumee, Ratree; Namahoot, Jutatip; Ruamcharoen, Jareerat; Ruamcharoen, Polphat

doi:10.1016/j.ijadhadh.2012.11.007

Cited by 44 publications

(33 citation statements)

References 5 publications

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“…The application of NR may be explored further once it is subjected to modification. Samples of modified NR, such as liquid natural rubber (LNR), a degraded and shorter NR chains has been shown to be useful as compatibilizers [1,2], reactive plasticizers [3], adhesive [4] and coating [5].…”

Section: Introductionmentioning

confidence: 99%

“…The oxidative degradation of NR to telechelic LNR (TLNR) as reported by many researchers was via redox reaction [6,7] oxidation [8,9], photochemical oxidation [10], ozonolysis [11] and few others [12]. This reactive TLNR is very useful as intermediates in various applications such as adhesives [4,13], plastisizers [14], modifier [15,16], as well as for chain extension [17][18][19] and grafting [20].…”

Section: Introductionmentioning

confidence: 99%

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Functionalization of Liquid Natural Rubber via Oxidative Degradation of Natural Rubber

2014

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Natural rubber (NR) is a high molecular weight natural polymer and can be degraded to liquid natural rubber (LNR) leaving certain functional groups at the end of chains. In this study, LNR samples prepared via oxidative degradation using H2O2 and NaNO2 as reagents were found to have different end groups depending on the pH of the reaction medium. In an acidic medium, LNR with hydroxyl terminal groups was formed as the degradation reaction was initiated by hydroxyl radicals produced from decomposition of peroxynitrite acid. In contrast, a redox reaction took place in an alkaline medium to yield LNR with carbonyl terminal groups. The mechanisms of reaction are discussed and proposed to explain the formation of different end groups when reaction carried out in acidic and alkaline media. Chain degradation in an acidic medium seems to be more effective than in an alkaline medium, and thus yields LNR with lower Mn.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functionalization of Liquid Natural Rubber via Oxidative Degradation of Natural Rubber

2014

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“…Green strength indicates the time to bond the wood veneers together before the adhesive develops ultimate bond properties when fully cured (Kong et al, 2011;Phetphaisit et al, 2013). In practice, a series of shear strength measurements with different curing times (i.e., time course) are performed.…”

Section: Green Strengthmentioning

confidence: 99%

Comparison of the Adhesive Performances of Soy Meal, Water Washed Meal Fractions, and Protein Isolates

He¹,

Chapital²,

Cheng³

2016

MAS

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Adhesive bonding of wood plays an increasing role in the forest products industry and is a key factor for efficiently utilizing timber and other lignocellulosic resources. In this work, we obtained five soy meal products through commercial sources or in-house preparations. The protein content was 49.6%, 56.9%, 66.2%, 86.3%, and 91.9% for untreated defatted soy meal, pH 8.5 water washed meal, neutral water washed meal, commercial protein isolate, and in-house prepared protein isolate. The adhesive performances measured by the maximal dry and soaked shear strength of the bonded maple veneers at break were not exactly in the same order of the protein content, indicating that other components (e.g. carbohydrates, metals) might also have played certain roles in the adhesive ability of these products. Data at two press temperatures (i. e. 100, and 130 o C) with or without the addition of tung oil revealed that water washed soy meals behaved more like untreated meal than soy protein isolates. This observation is different from a recent report on the effect of water washing on cottonseed meal products. Thus, further elucidation of the mechanisms or causes of the differing effects of water washing would shed light on the adhesive mechanisms of the two types of oilseed meal materials, thus optimizing use of these materials and their fractions for wood bonding.

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“…This was because the mixing of PET-COOH, HLNR and polymeric MDI generates a polyurethane amide hybrid structure that has shown higher performance in; physical properties, thermal stability and chemical resistance than that of the polyurethane structure prepared from PET-OH, HLNR and MDI [17]. Therefore, the two different components of hydroxyl of HLNR and carboxylic acid of modified PET with polymeric MDI were used in preparation of the coating material.…”

Section: Introductionmentioning

confidence: 99%

Green metal organic coating from recycled PETs and modified natural rubber for the automobile industry

Phetphaisit

Namahoot

Saengkiettiyut

et al. 2015

Progress in Organic Coatings

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Polyurethane polyester elastomer: Innovative environmental friendly wood adhesive from modified PETs and hydroxyl liquid natural rubber polyols

Cited by 44 publications

References 5 publications

Functionalization of Liquid Natural Rubber via Oxidative Degradation of Natural Rubber

Functionalization of Liquid Natural Rubber via Oxidative Degradation of Natural Rubber

Comparison of the Adhesive Performances of Soy Meal, Water Washed Meal Fractions, and Protein Isolates

Green metal organic coating from recycled PETs and modified natural rubber for the automobile industry

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