公开(公告)号：US20180208686A1

公开(公告)日：2018-07-26

申请号：US15744398

申请日：2016-07-13

Applicant: THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun ,  Richard S. Glass ,  Robert A. Norwood ,  Jared J. Griebel ,  Soha Namnabat

IPC: C08F12/30 ,  C08G75/14 ,  C08L81/04 ,  C08K3/06 ,  C08F12/08 ,  C08F212/08

CPC classification number: C08F12/30 ,  C08F2/38 ,  C08F2/44 ,  C08F12/08 ,  C08F212/08 ,  C08G75/00 ,  C08G75/14 ,  C08K3/06 ,  C08L81/00 ,  C08L81/04 ,  H01M4/38 ,  H01M4/382 ,  H01M4/602 ,  H01M10/052

Abstract: Copolymerization of elemental sulfur with functional comonomers afford sulfur copolymers having a high molecular weight and high sulfur content. Nucleophilic activators initiate sulfur polymerizations at relative lower temperatures and in solutions, which enable the use of a wider range of comonomers, such as vinylics, styrenics, and non-homopolymerizing comonomers. Nucleophilic activators promote ring-opening reactions to generate linear polysulfide intermediates that copolymerize with comonomers. Dynamic sulfur-sulfur bonds enable re-processing or melt processing of the sulfur polymer. Chalcogenide-based copolymers have a refractive index of about 1.7-2.6 at a wavelength in a range of about 5000 nm-8μιτι. The sulfur copolymer can be a thermoplastic or a thermoset for use in elastomers, resins, lubricants, coatings, antioxidants, cathode materials for electrochemical cells, dental adhesives/restorations, and polymeric articles such as polymeric films and free-standing substrates. Optical substrates are constructed from the chalcogenide copolymer and are substantially transparent in the visible and infrared spectrum.