The biodegradable cellulose-derived polyol and polyurethane foam
نویسندگان
چکیده
منابع مشابه
Biological monitoring of TDI-derived amines in polyurethane foam production.
BACKGROUND Toluene diisocyanate (TDI) is used in industry in the production of flexible polyurethane foam, commonly a mixture of the 2,4- and 2,6- isomers. The production process may lead to exposure to diisocyanates which are associated with respiratory disease. A method has been available for the determination of TDI biomarkers in urine for some years. AIMS To explore the usefulness of urin...
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Anisotropic polymer foams have been prepared, which exhibit a Poisson's ratio exceeding 1, and ratios of longitudinal to transverse stiffness exceeding 50. The foams are as much as 20 times stiffer in the longitudinal direction than the foams from which they were derived. The transformation process involved applying a uniaxial stress sufficient to produce 25% to 45% axial strain to open-cell po...
متن کاملEffect of replacing polyol by organosolv and kraft lignin on the property and structure of rigid polyurethane foam
UNLABELLED BACKGROUND Lignin is one of the three major components in plant cell walls, and it can be isolated (dissolved) from the cell wall in pretreatment or chemical pulping. However, there is a lack of high-value applications for lignin, and the commonest proposal for lignin is power and steam generation through combustion. Organosolv ethanol process is one of the effective pretreatment ...
متن کاملClosure of oroantral communications using biodegradable polyurethane foam: a feasibility study.
PURPOSE The aim of this study was to assess the feasibility of biodegradable polyurethane (PU) foam for closure of oroantral communications (OACs). PATIENTS AND METHODS Ten consecutive patients with OACs (existing <24 hours) were treated with PU foam. Standardized evaluations were performed at 2 weeks and 8 weeks after closure of the OAC. RESULTS In 5 patients, the OACs were closed successf...
متن کاملFeasibility of conical biodegradable polyurethane foam for closure of oroantral communications.
PURPOSE To assess the feasibility of a conically shaped biodegradable polyurethane (PU) foam for closure of oroantral communications (OACs). PATIENTS AND METHODS In 10 consecutive patients, fresh OACs (present for <24 hours) were closed with PU foam. Standardized evaluations were performed at 2 and 8 weeks after closure of the OAC. Success was considered permanent closure of the OAC. RESULT...
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ژورنال
عنوان ژورنال: Polymer Testing
سال: 2021
ISSN: 0142-9418
DOI: 10.1016/j.polymertesting.2021.107250