[EN] alpha , omega -ALLYL TERMINATED LINEAR POLY(METHACRYLIC ACID) MACROMONOMERS FOR END-LINKED HYDROGELS AND METHOD OF PREPARATION<br/>[FR] MACROMONOMERES D'ACIDE POLYMETHACRYLIQUE LINEAIRE A TERMINAISON DOLLAR G(A), DOLLAR G(V)-ALLYLE POUR HYDROGELS A LIAISON D'EXTREMITE ET SON PROCEDE DE PREPARATION
申请人:UNIV COLUMBIA
公开号:WO2003101934A1
公开(公告)日:2003-12-11
Disclosed is a method for making α,φ-allyl terminated macromonomers comprising a plurality of units of an α,β-unsaturated carboxylic acid. The method comprises forming a first mixture containing an ester of an α,β-unsaturated carboxylic acid, a radical initiator comprising an allyl group and a halogen, and a catalyst comprising a transition metal complex. The ester of the α,β-unsaturated carboxylic acid is an ester capable of reacting with a mixture comprising trifluoroacetic acid (TFA) to form the α,β-unsaturated carboxylic acid. The mixture is stirred to form a second mixture containing an α-allyl,φ-halogen-terminated macromonomer comprising a plurality of units of the ester of the α,β-unsaturated carboxylic acid. A third mixture comprising a compound containing at least one transferable allyl group is then added to the second mixture to form a fourth mixture containing a first α,φ-allyl terminated macromonomer comprising a plurality of units of the ester of the α,β-unsaturated carboxylic acid. The first α,φ-allyl terminated macromonomer is separated from the fourth mixture and is mixed with a mixture containing TFA to form a fifth mixture containing the α,φ-allyl terminated macromonomer comprising a plurality of units of the α,β-unsaturated carboxylic acid. The α,φ-allyl terminated macromonomer comprising a plurality of units of the α,β-unsaturated carboxylic acid is then separated from the fifth mixture. Also enclosed is a related method for making end-linked hydrogels comprising a plurality of units of an α,β-unsaturated carboxylic acid. The method comprises forming a first mixture containing an α,φ-allyl terminated macromonomer comprising a plurality of units of the α,β-unsaturated carboxylic acid and a radical initiator. The first mixture is treated with UV-radiation, visible light, or heat to form a second mixture comprising an end-linked hydrogel comprising a plurality of units of the α,β-unsaturated carboxylic acid.
本文揭示了一种制备α,φ-烯丙基端基化的大分子单体的方法,其中包括多个α,β-不饱和羧酸单元。该方法包括形成第一混合物,其中包含α,β-不饱和羧酸的酯,具有烯丙基和卤素的自由基引发剂,以及过渡金属配合物催化剂。α,β-不饱和羧酸的酯是一种能够与三氟乙酸(TFA)混合物反应形成α,β-不饱和羧酸的酯。混合物被搅拌形成第二混合物,其中包含α-烯丙基,φ-卤素端基化的大分子单体,包括α,β-不饱和羧酸酯的多个单元。然后向第二混合物中添加至少含有一个可转移烯丙基的化合物,形成第四混合物,其中包含第一个α,φ-烯丙基端基化的大分子单体,包括α,β-不饱和羧酸酯的多个单元。第一个α,φ-烯丙基端基化的大分子单体从第四混合物中分离出来,并与含有TFA的混合物混合,形成第五混合物,其中包含α,φ-烯丙基端基化的大分子单体,包括α,β-不饱和羧酸的多个单元。然后从第五混合物中分离出α,φ-烯丙基端基化的大分子单体,包括α,β-不饱和羧酸的多个单元。此外,本文还揭示了一种制备端基连接的水凝胶的相关方法,其中包括多个α,β-不饱和羧酸单元。该方法包括形成第一混合物,其中包含α,φ-烯丙基端基化的大分子单体,包括α,β-不饱和羧酸的多个单元和自由基引发剂。将第一混合物用紫外线辐射、可见光或热处理,形成第二混合物,其中包括端基连接的水凝胶,包括α,β-不饱和羧酸的多个单元。