摘要:
Cyclic alkyl, particularly cyclohexyl, substituted glycolides and polylactides are described. The polylactides have a high glass transition temperature and improved clarity.
摘要:
Cyclic alkyl, particularly cyclohexyl, substituted glycolides and polylactides are described. The polylactides have a high glass transition temperature and improved clarity.
摘要:
A homopolymer of 1,4-benzodioxepin-3-cyclohexyl-2,5-dione with a Tg of 120° C. Copolymers are also described. The polymers are useful for surgical and other applications where biodegradability is important.
摘要:
Cyclic alkyl, particularly cyclohexyl, substituted glycolides and polylactides are described. The polylactides have a high glass transition temperature and improved clarity.
摘要:
A homopolymer of 1,4-benzodioxepin-3-cyclohexyl-2,5-dione with a Tg of 120° C. Copolymers are also described. The polymers are useful for surgical and other applications where biodegradability is important.
摘要:
A method and system for providing a user interface for presenting images of clusters of an image search result is provided. The user interface system displays the search result in a cluster/view form using a cluster panel and a view panel. The cluster panel contains a cluster area for each cluster. The view panel may contain thumbnails of images of the search result in a list view or a mix view. When a user selects a cluster area from the cluster panel, the user interface system displays a list view of thumbnails for that cluster in the view panel. The user interface system may display a thumbnail list near a cluster area of the cluster panel. The thumbnail list contains mini-thumbnails of the images of the selected cluster. The user interface system may also display a detail view of an image in the view panel when a user selects an image.
摘要:
A method for producing a product that comprises glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate comprises reacting either glycerol or propylene glycol with ethyl levulinate in the presence of a homogenous or heterogeneous catalyst system in a reactor system. The ethyl levulinate and either glycerol or propylene glycol are heated to remove water, polyol, and excess ethyl levulinate. The excess ethyl levulinate and polyol is recycled back to the reactor. The product is distilled in a specific fashion and optionally treated by means of a stabilizing agent or acid species removal bed, to obtain a composition comprising glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate wherein the composition comprises less than or equal to about 2 wt % contaminants.
摘要:
A method and system for providing a user interface for presenting images of clusters of an image search result is provided. The user interface system displays the search result in a cluster/view form using a cluster panel and a view panel. The cluster panel contains a cluster area for each cluster. The view panel may contain thumbnails of images of the search result in a list view or a mix view. When a user selects a cluster area from the cluster panel, the user interface system displays a list view of thumbnails for that cluster in the view panel. The user interface system may display a thumbnail list near a cluster area of the cluster panel. The thumbnail list contains mini-thumbnails of the images of the selected cluster. The user interface system may also display a detail view of an image in the view panel when a user selects an image.
摘要:
The invention described herein provides a novel lactide monomer derivative and process for preparing the lactide monomer derivative. The monomer derivative of the invention is bifunctional in nature, and can be employed a variety of efficient synthesis processes to prepare various polymers. Further, the bifunctional monomer derivative can be used to prepare various intermediate-stage compounds and polymers, which in turn can be used to synthesize other compounds, polymers, copolymers and composites. The lactide monomer derivative has a bifunctional norbornene spiro lactide structure, spiro[6-methyl-1,4-dioxane-2,5-dione-3,2′-bicyclo[2.2.1]hept[5]ene], and structure as follows: and stereoisomers thereof. The lactide monomer derivative is bifunctional in that either 1) the norbornene ring, 2) lactide ring, or 3) both, can be opened and used in polymer synthesis for the backbone or the reactive branch for other polymeric syntheses.