公开(公告)号：US11078333B2

公开(公告)日：2021-08-03

申请号：US15744398

申请日：2016-07-13

Applicant: 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: C08G75/14 ,  C08G75/16 ,  C08G79/00 ,  C08L81/04 ,  C08F12/08 ,  C08F212/08 ,  C08G75/00 ,  H01M10/052 ,  C08L81/00 ,  H01M4/60 ,  H01M4/38 ,  C08F12/30 ,  C08K3/06 ,  C08F228/04 ,  C08F228/06 ,  C08F228/02 ,  C08F230/04 ,  C08F2/38 ,  C08F2/44

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.

公开(公告)号：US11163113B2

公开(公告)日：2021-11-02

申请号：US16639824

申请日：2018-08-14

Applicant: Arizona Board of Regents on Behalf of the University of Arizona

Inventor： Soha Namnabat ,  Robert A. Norwood ,  Kyung-Jo Kim ,  Roland Himmelhuber

IPC: G02B6/122 ,  C08K5/56 ,  C08L83/04 ,  G02B6/12 ,  G02B6/293

Abstract: An athermal optical waveguide structure such as an optical add drop multiplexer (OADM) or the like is fabricated by a method that includes forming a lower cladding layer on a substrate. A waveguiding core layer is formed on the lower cladding layer. An upper cladding layer is formed on the waveguiding core layer and the lower cladding layer a sol-gel material. The sol-gel material includes an organically modified siloxane and a metal oxide. A thermo-optic coefficient of the sol-gel material is adjusted by curing the sol-gel material for a selected duration of time at a selected temperature such that the thermo-optic coefficient of the sol-gel material compensates for a thermo-optic coefficient of at least the waveguiding core layer such that an effective thermo-optic coefficient of the optical waveguide structure at a specified optical wavelength and over a specified temperature range is reduced.

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.