公开(公告)号：US20220033556A1

公开(公告)日：2022-02-03

申请号：US17277125

申请日：2019-09-17

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Jobi VARGHESE ,  Yves GNANOU ,  Nikos HADJICHRISTIDIS ,  Mingchen JIA ,  Dhanya AUGUSTINE

IPC: C08F293/00 ,  C08G65/12 ,  C08G65/26 ,  C08G63/664 ,  C08G64/34

Abstract: Embodiments include degradable polyethers comprising ester units from a cyclic ester or carbonate units from carbon dioxide incorporated into a poly(ethylene oxide) backbone or a multifunctional core of a degradable polyether star. Embodiments include methods of forming a degradable polyether comprising contacting an ethylene oxide monomer with a lactide monomer or carbon dioxide in the presence of an alkyl borane and an initiator. Embodiments include methods of forming degradable polyether stars comprising contacting a diepoxide monomer with carbon dioxide and/or a cyclic ester in the presence of an initiator and a first amount of an alkyl borane to form a multifunctional core comprising degradable carbonate linkages and/or degradable ester linkages, and contacting the multifunctional core with an ethylene oxide monomer in the presence of a second amount of an alkyl borane to form arms of a polyether attached to the degradable multifunctional core.

公开(公告)号：US20210309801A1

公开(公告)日：2021-10-07

申请号：US17203931

申请日：2021-03-17

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Jobi VARGHESE ,  Yves GNANOU ,  Nikos HADJICHRISTIDIS ,  Mingchen JIA ,  Dhanya AUGUSTINE

IPC: C08G65/10 ,  C08F293/00

Abstract: Degradable ethylene oxide-based copolymers, including random, tapering, and block copolymers are described. For example, the present disclosure describes materials and methods for synthesizing degradable hydrophilic ethylene oxide-based copolymers, degradable amphiphilic ethylene oxide-based block copolymers, degradable hydrophobic polyethers and degradable functionalized polyethers via boron-activated copolymerization of ethylene oxide monomers with carbon dioxide.

公开(公告)号：US20230242699A1

公开(公告)日：2023-08-03

申请号：US17923395

申请日：2021-05-06

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Mingchen JIA ,  Yves GNANOU

IPC: C08G18/00

CPC classification number: C08G18/003

Abstract: The present disclosure features materials and methods for synthesizing polycarbamates via chain-growth copolymerization in the presence of a Lewis acid of a first reactant having a oxirane or thiirane moiety and at least one heteroallene reactant, wherein a first heteroallene reactant is an isocyanate or an isothiocyanate. Also featured are polycarbamate copolymers and terpolymers according to formula (I): (I), wherein An is a halogen atom or a carboxylate or alkoxide moiety; each X and X′ is independently an oxygen or a sulfur atom; each R1 and R2 is independently a hydrogen atom or an alkyl group including linear, branched, saturated, unsaturated, aromatic, cyclic alkyl groups, and heteroatom-containing alkyl groups, R3 is an electron deficient group, m and o are independently selected from integers ≥ 1 and n is 0 or an integer ≥ 1. Both X and X′ can be the same or X and X′ can be different.