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US 2019/0375870 A1Published application
Method of preparing acrylonitrile-based polymer for producing carbon fiber
AssigneeLG Chem, Ltd.
InventorsChang Hun KIM, Hyun Min KIM, Jeong Hun CHO, Joon Hee CHO
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Abstract
A method of preparing an acrylonitrile-based copolymer for a carbon fiber. The method includes: preparing a reaction solution including a (meth)acrylonitrile-based monomer and a first reaction solvent; adding a first portion of a radical polymerization initiator to the reaction solution to initiate polymerization; and adding a second portion of the radical polymerization initiator to the reaction solution when a polymerization conversion ratio is between 70 to 80%.
Claims11
A method of preparing an acrylonitrile-based copolymer for a carbon fiber, comprising:
- preparing a reaction solution comprising a (meth)acrylonitrile-based monomer and a first reaction solvent;
- primarily adding an initiator to the reaction solution to initiate polymerization;
- and
- secondarily adding an initiator when a polymerization conversion ratio reaches between 70 to 80% to perform polymerization.
1 more element
11-14. (canceled)
Dependencies are inferred from the claim text.