公开(公告)号：US12091484B2

公开(公告)日：2024-09-17

申请号：US16982536

申请日：2019-03-18

Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： John Matson ,  Kyle Arrington ,  Kevin Edgar ,  Junyi Chen

IPC: C08F293/00 ,  C08F290/10 ,  C08L65/00

CPC classification number: C08F293/00 ,  C08F290/10 ,  C08L65/00

Abstract: Described herein are block copolymers that can be used as compatibilizers. The block copolymers can be graft block or triblock copolymers. The block copolymers can include a polysaccharide or a polyester and a polyolefin. Also described herein are polymer blends that can include and be made using the block copolymers described herein.

公开(公告)号：US20130178614A1

公开(公告)日：2013-07-11

申请号：US13661028

申请日：2012-10-25

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Kevin Edgar ,  Daiqiang Xu ,  Xueyan Zheng

IPC: C08B3/24 ,  C08B3/06 ,  C08B3/08

CPC classification number: C08B3/24 ,  C08B3/00 ,  C08B3/06 ,  C08B3/08 ,  C08B3/16 ,  C08J5/18 ,  C08J2301/10 ,  C08L1/10

Abstract: Embodiments of the invention provide regioselectively substituted carbohydrate and polysaccharide derivatives, such as cellulose esters, and methods for preparing them. Particular methods of the invention include deacylation of esters using tetrabutylammonium fluoride to obtain selective substitution at desired hydroxyl position(s) of the ester. Preferred is deacylation of an ester, which shows selectivity for removal of acyl groups from the ester of the secondary alcohols at C-2 and C-3, and which affords cellulose-6-O-esters with high regioselectivity by a simple one-step process employing no protective groups. Inventive regioselectively substituted cellulose esters can be prepared by such methods to obtain esters with the following anhydroglucose repeating units: wherein R1, R2, and R3 are each independently chosen from a hydrogen atom, and, whether substituted or unsubstituted, branched or unbranched, an alkanoyl group, an aroyl group, and a heteroaroyl group. In embodiments, the alkanoyl, aroyl and heteroaroyl groups can comprise from 1-20 carbon atoms.