公开(公告)号：US11377508B2

公开(公告)日：2022-07-05

申请号：US17414969

申请日：2020-12-29

申请人： CHANGZHOU UNIVERSITY

发明人： Wenyan Huang ,  Di Zhu ,  Bibiao Jiang ,  Xiaoqiang Xue ,  Hongjun Yang ,  Li Jiang ,  Qimin Jiang

IPC分类号： C08F20/20 ,  C08L33/14 ,  C08F2/32 ,  C08F4/40 ,  C08F120/20

摘要： Temperature-responsive poly(2-hydroxyethyl methacrylate) (PHEMA) and a preparation method thereof are disclosed. In the preparation method, with a system consisting of benzoyl peroxide (BPO) (an oxidant) and 2-methyl-N-[3-(methyl-phenyl-amino)-propyl]-acrylamide (MPAEMA) or 2-methyl-N-[3-(methyl-phenyl-amino)-propyl]-propionamide (MEMA) (a reducing agent monomer) as a redox initiation system, water and toluene as media, a nonionic surfactant as an emulsifier, and 2-hydroxyethyl methacrylate (HEMA) as a polymerization monomer, polymerization is conducted at room temperature and atmospheric pressure to obtain the PHEMA. An alcohol solution of the PHEMA has an upper critical solution temperature (UCST). The method has the advantages of simple and stable polymerization system, low polymerization cost, easy operation, mild conditions, small impact on the environment, and low energy consumption. Moreover, a molecular weight and UCST of a product are controllable within a specified range.

公开(公告)号：US11814451B2

公开(公告)日：2023-11-14

申请号：US17935573

申请日：2022-09-26

申请人： CHANGZHOU UNIVERSITY

发明人： Wenyan Huang ,  Bibiao Jiang ,  Li Jiang ,  Hongjun Yang ,  Qimin Jiang ,  Xiaoqiang Xue ,  Di Zhu

IPC分类号： C08F120/20

CPC分类号： C08F120/20

摘要： The present disclosure may generally relate to the field of polymer synthesis and provide a method for preparing branched poly(2-hydroxyethyl methacrylate) at room temperature by inverse emulsion polymerization. The method may include: using benzoyl peroxide as an oxidant, and 2-methyl-N-[3-(methyl-phenyl-amino)-propyl]-acrylamide as a reductant monomer to form a redox initiation system, water, and toluene as media, a nonionic surfactant as an emulsifier, 2-hydroxyethyl methacrylate as a monomer, reacting at room temperature and normal pressure to obtain branched poly(2-hydroxyethyl methacrylate). In the present disclosure, the polymerization system may be simple and stable, and the synthesis and purification of the reductant monomer may be simple, greatly reducing the polymerization cost. The reaction may not need temperature control and pressure control, with low energy consumption, easy operation, and less impact on the environment. The obtained branched poly(2-hydroxyethyl methacrylate) may have a high molecular weight. The molecular weight and a branching degree may be adjusted in a wide range. The method may be of great significance to the theoretical research and large-scale application of branched poly(2-hydroxyethyl methacrylate).