Medical University of South Carolina

Chuanbing Tang

Alan Decho

Jifu Wang

Yung Pin Chen

Liang Yuan

Yung-Pin Chen

Harry J Ploehn

Tianyu Zhu

Jiuyang Zhang

Yali Qiao

Morgan Stefik

Md Sayful Islam

Sayful Islam

Zhongkai Wang

Amrita Sarkar

Kejian Yao

Lixia Ren

Christopher G Hardy

Alper Nese

Jeffery Hayat

Meghan Lamm

Chemically inert, mechanically tough, cationic metallo-polyelectrolytes designed as durable anion-exchange membranes (AEMs) via ring-opening metathesis polymerization (ROMP) of cobaltocenium-containing cyclooctene with triazole as the only linker group, followed by backbone hydrogenation to provide a new class of AEMs with a polyethylene-like framework and alkaline-stable cobaltocenium cation for ion transport, which exhibit excellent thermal, chemical and mechanical stability, as well as high ion conductivity.

Preparation of metallocene containing cationic polymers for anion exchange applications

A trifluoroacetic acid-based etchant is described that can remove a sacrificial component of a multi-component polymer, e.g., a self-assembled block copolymer. The etchant can operate at a high etch rate and with excellent selectivity. The etchant can remove a hydrolysable sacrificial component such as a polylactide block from a self-assembled block copolymer. The etchant enables the macroscopic preservation of the nanostructure morphologies of self-assembled copolymers (e.g., poly(styrene-block-lactide) copolymers) and can yield pristine porous films of the non-hydrolysable component of the starting multi-component polymer.

Etchant for use in rapid formation of robust porous polymers

Monomer compounds and methods of synthesizing monomer compounds are disclosed. The monomer compounds can include maleate and maleimide monomers having fatty acid moieties. The monomer compounds can be derived from renewable sources such as corn, soybean, and sunflower oils. The monomer compounds can be formed into homopolymers as well as copolymers. The copolymers can include petroleum-derived monomers such as styrene, ethylene, and propylene.

Preparation of maleate and maleimide monomers and polymeric materials from triglycerides

A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.

Preparation of thermoplastic epoxidized polymers and thermosetting materials from triglycerides

Methods for forming a compound from a plant oil compound having a carboxylic acid group attached to an organic group are provided. The method can include performing an aminolysis reaction between the plant oil compound and a hydroxyl-containing amine compound to form a functionalized plant oil compound having an amide bond; and functionalizing the hydroxyl group to have a polyerizable vinyl group or a norbornene group to form a polyerizable plant oil compound having the amide bond and an ester bond.

Preparation of chemicals, monomers and polymers from plant oils

Anion-paired metallocene-containing compounds are generally provided, along with methods of making the same. In one embodiment, the anion-paired metallocene-containing compound includes a cationic metallocene moiety covalently connected to an organic functional group, and an anion paired to the cationic metallocene moiety. Generally, the cationic metallocene moiety comprises two cyclopentadienyl anions bound to a metal center in the oxidation state I.

Anion-paired cationic metallocene-containing compounds and polymers as antimicrobial agents

Methods are generally provided for preparing a polymeric composition that includes a grafted block copolymer. Methods are also generally provided for preparing a polymeric composition that includes a star block copolymer prepared from a central core molecule that includes a plurality of attachment moieties. Methods are also generally provided for preparing a polymeric composition that includes a linear block copolymer. Block copolymers are also generally provided. Multi-segmented linear block copolymers are also generally provided.

Multiple copolymer systems as templates for block copolymer nanolithography

A &#x3c0;-conjugated aromatic/heteroaromatic oligomer-containing vinyl monomer is generally provided, which can include a polymerizable group, a linker group, and a &#x3c0;-conjugated aromatic/heteroaromatic side chain. The &#x3c0;-conjugated aromatic/heteroaromatic side chain includes a first cyclopentadiene ring covalently attached to the linder group, a set of second cyclopentadiene rings covalently attached to the first cyclopentadiene ring, and a third cyclopentadiene ring positioned at a terminal end of the &#x3c0;-conjugated aromatic/heteroaromatic side chain such that the set of second cyclopentadiene rings is positioned between the first cyclopentadiene ring and the third cyclopentadiene ring. Methods are also provided for forming a polymer via polymerizing the &#x3c0;-conjugated aromatic/heteroaromatic oligomer-containing vinyl monomer, and for grafting a &#x3c0;-conjugated aromatic/heteroaromatic oligomer-containing polymer onto a surface of a nanomaterial.

Preparation of conjugated aromatic/heteroaromatic oligomer-containing dielectric polymers and their applications

Methods for forming rosin-derived cationic compounds are provided. The method can include attaching a cationic group to a conjugated diene on a hydrophenathrene-based ring of a resin acid (e.g., levopimaric acid, abietic acid, dehydroabietic acid, or a mixture thereof) to form a rosin-derived cationic compound. Attaching the cationic group to the conjugated diene on the hydrophenathrene-based ring of the resin acid can be achieved via a Diels-Alder reaction of a dienophile with the hydrophenathrene-based ring of the resin acid. Rosin-derived cationic compounds are also provided. The rosin-derived cationic compound can include a cationic group attached to a conjugated diene on a hydrophenathrene-based ring of a resin acid, wherein the rosin-derived cationic compound further comprises a carboxylic acid group.

Rosin-derived cationic compounds and polymers

A &#x3c0;-conjugated aromatic/heteroaromatic oligomer-containing vinyl monomer is generally provided, which can include a polymerizable group, a linker group, and a &#x3c0;-conjugated aromatic/heteroaromatic side chain. The &#x3c0;-conjugated aromatic/heteroaromatic side chain includes a first cyclopentadiene ring covalently attached to the linker group, a set of second cyclopentadiene rings covalently attached to the first cyclopentadiene ring, and a third cyclopentadiene ring positioned at a terminal end of the &#x3c0;-conjugated aromatic/heteroaromatic side chain such that the set of second cyclopentadiene rings is positioned between the first cyclopentadiene ring and the third cyclopentadiene ring. Methods are also provided for forming a polymer via polymerizing the &#x3c0;-conjugated aromatic/heteroaromatic oligomer-containing vinyl monomer, and for grafting a &#x3c0;-conjugated aromatic/heteroaromatic oligomer-containing polymer onto a surface of a nanomaterial.

Methods of forming polymer material from rosin-derived material are provided, along with the resulting polymers. For example, a plurality of functionalized resin acids having a polymerizable functional group via controlled living polymerization can be polymerized into the polymeric material such that each polymer defines a functional end group and the polymeric material has a polydispersity index of about 1 to about 1.5.

Polymers derived from rosin and their methods of preparation

The present invention relates generally to degradable polymers, including degradable polymers that may be responsive to ionic strength. The invention also relates generally to methods of making degradable polymers and methods of using such polymers.

Growing community of inventors

Columbia, SC, United States of America

Chuanbing Tang