摘要:
Polymeric foams having nanocellular morphology are formed from a polymeric material having structural units derived from 2-hydrocarbyl-3,3- bis(hydroxyphenyl)phthalimidine compound. The foams include a plurality of cells having an average diameter of less than 1 micron. Processes for forming the foams include melting a polymeric material having structural units derived from 2- hydrocarbyl-3,3-bis(hydroxyphenyl)phthalimidine compounds; diffusing a blowing agent into the polymeric material to form a mixture; nucleating bubbles in the mixture is at a sufficient temperature and pressure to enable the production of cells having an average diameter of less than 1 micron; stabilizing the cells; and forming the mixture into a desired shape.
摘要:
Die Verwendung eines thermoplastischen Faserverbund-Werkstoffs, enthaltend: a) eine thermoplastische Formmasse A als Matrix, b) eine Lage aus Verstärkungsfasern B, und c) optional ein Additiv C, wobei die Lage aus Verstärkungsfasern B in die thermoplastische Formmasse A eingebettet ist, und wobei die thermoplastische Formmasse A mindestens eine chemisch reaktive Funktionalität aufweist, welche während des Herstellungsprozesses des Faserverbund-Werkstoffs mit chemischen Gruppen an der Oberfläche der Verstärkungsfaser-Komponente B reagiert, und wobei die als Matrix fungierende thermoplastische Formmasse A transparent oder transluzent ist und gegenüber Matrices, die keine chemisch reaktive Funktionalität aufweisen, gemessen bei 1 mm Schichtdicke eine um 10% höhere Transparenz oder Transluzenz für weißes Licht besitzt, eignet sich besonders zur Herstellung von transparenten oder transluzenten Formkörpern, Folien und Beschichtungen.
摘要:
A method of creating a hydrogel, comprising the step of condensing first and second functional groups, wherein the first group comprises a molecule or macromolecule of interest containing two or more hydroxylamine or aminooxy groups and the second group comprises a molecule or macromolecule of interest containing two or more aldehyde/ketone/other reactive oxo groups, under conditions such that a hydrogel forms.
摘要:
The present disclosure relates to curing of polymers, particularly to self curing elastomers. The present disclosure provides a process for curing of azidated copolymers of isoolefins and olefinic monomers. The azidated copolymers are prepared by reacting the copolymer with an azidation reagent to form an azidated copolymer. This is followed by the addition of fillers then heating at a temperature suitable to cure the azidated copolymer in the absence of additional curative agents. Filled cured azidated copolymers prepared herein optionally comprise micropores created in situ during curing via release of nitrogen, resulting in one or more of reduced density, reduced durometer, or reduced leachable/extractable components.
摘要:
A blowing agent for thermosetting foams is disclosed. The blowing agent is a hydrofluoroolefin (HCFO), preferably HFCO-1234yf in combination with a hydrochlorofluoroolefin (HCFO) preferably one selected from HCFO-1233zd, HCFO-1223, HCFO-1233xf and mixtures thereof. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.
摘要:
A blowing agent for thermosetting foams is disclosed. The blowing agent is the hydrofluoropropene HFO-1243zf in combination with a hydrochlorofluoroolefin (HCFO) selected from HCFO-1233zd, HCFO-1233xf and HCFO-1223. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.
摘要:
A blowing agent for thermosetting foams is disclosed. The blowing agent is a hydrofluoroolefin (HCFO), preferably HFCO-1234ze in combination with a hydrochlorofluoroolefin (HCFO) preferably one selected from HCFO-1233zd, HCFO-1223, HCFO-1233xf and mixtures thereof. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.