Henrich; Meyer,W., Chemische Berichte, 1903, vol. 36, p. 886
作者:Henrich、Meyer,W.
DOI:——
日期:——
Weselsky, Chemische Berichte, 1874, vol. 7, p. 439
作者:Weselsky
DOI:——
日期:——
POLYCARBONATE POLYOL COMPOSITIONS AND METHODS
申请人:Allen Scott D.
公开号:US20110230580A1
公开(公告)日:2011-09-22
In one aspect, the present disclosure encompasses polymerization systems for the copolymerization of CO
2
and epoxides comprising 1) a catalyst including a metal coordination compound having a permanent ligand set and at least one ligand that is a polymerization initiator, and 2) a chain transfer agent having two or more sites that can initiate polymerization. In a second aspect, the present disclosure encompasses methods for the synthesis of polycarbonate polyols using the inventive polymerization systems. In a third aspect, the present disclosure encompasses polycarbonate polyol compositions characterized in that the polymer chains have a high percentage of —OH end groups and a high percentage of carbonate linkages. The compositions are further characterized in that they contain polymer chains having an embedded polyfunctional moiety linked to a plurality of individual polycarbonate chains.
SYSTEMS AND METHODS EXTENDING THE LASERSPRAY IONIZATION MASS SPECTROMETRY CONCEPT FROM ATMOSPHERIC PRESSURE TO VACUUM
申请人:Trimpin Sarah
公开号:US20150053854A1
公开(公告)日:2015-02-26
Disclosed herein are systems and methods that allow analysis of macromolecular structures using laserspray ionization at intermediate pressure or high vacuum using commercially available mass spectrometers with or without modification and with the application of heat. The systems and methods produce multiply-charged ions for improved analysis in mass spectrometry.