Cyclic peptide trypsin inhibitor SFTI-1 was synthesized via intramolecular ligation of a linear peptidehydrazide with high yield. This cyclization strategy did not cause epimerization at the C-terminal Arg residue. CD spectrum and NMR spectroscopy analysis demonstrated that well-folded SFTI-1 could be obtained via standard oxidative folding process. Thus, we present a simple and cost-efficient strategy
Extrusion of compositions of polyamides and epoxides
申请人:Du Pont Canada Inc.
公开号:EP0295906A1
公开(公告)日:1988-12-21
A process for the fabrication of a polyamide article is disclosed, in which a composition of a linear aliphatic polyamide, 0.01-5% by weight of an epoxide and 0.005-1.0% by weight of a catalyst selected from catalysts of the type used in the polymerization of polyamides and epoxide ring-opening compounds is admixed in a manner that provides an effectively uniform admixture and extruded. The epoxide compounds have at least two terminal epoxy groups and a molecular weight of less than 1000. A preferred catalyst is sodium hypophosphite. Increases in melt viscosity of the polyamide in excess of four-fold may be obtained. The compositions may be used in the formation of film by a blown film process, the blow moulding of bottles, thermoforming processes or the like.
A polyester polycarbonate composition which is transparent and has outstanding thermal stability
申请人:GENERAL ELECTRIC COMPANY
公开号:EP0736558A2
公开(公告)日:1996-10-09
A transparent polyester/polycarbonate resin composition and process for its preparation, polycarbonate resin having 5-100% terminal hydroxyl groups and polyester resin are melt blended and reacted by esterification in the presence of a catalyst, and acidic substances are subsequently added for deactivating said catalyst and forming a transparent resin which has favorable fluidity and improved stability during melt kneading and retention molding.
Films, sheets and molded products made of a polyester/polycarbonate composition
申请人:GENERAL ELECTRIC COMPANY
公开号:EP0774491A2
公开(公告)日:1997-05-21
Films, sheets or molded products composed thereof using a transparent polyester/polycarbonate composition having a single glass transition temperature and a single-phase morphology, characterized in that even when said films, sheets or molded products are subjected to heat treatment at a temperature in the vicinity of the glass transition temperature or above, crystallization is inhibited and transparency is retained.
Flame-retardant polyolefin foam and its production
申请人:Sekisui Alveo AG
公开号:EP2666626A1
公开(公告)日:2013-11-27
The present invention relates to a process for the production of a halogen-free, flame-retardant polyolefin foam, a polyolefin foam obtainable by the process and a laminate using the polyolefin foam. As halogen-free flame-retardant a combination of a phosphorus compound and a 1,3,5-triazine compound is used. The produced flame-retardant polyolefin foam exhibits particular advantageous mechanical, physical and chemical properties which allow its application especially in the construction and transport sectors.