Modified conjugated diene-based polymer and method for preparing the same
AssigneeLG Chem, Ltd.
InventorsHye Jung Shin, Ho Young Lee, Jung Hwan Oh
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Abstract
The present invention relates to a modified conjugated diene-based polymer having excellent affinity with a filler and a method for preparing the same, and provides a modified conjugated diene-based polymer including: a first chain comprising a repeating unit derived from a conjugated diene-based monomer; and one or more graft chains comprising a derived unit from an oligomer and graft-bonded to the first chain, wherein the derived unit from an oligomer comprises a residual group derived from a radical reactive functional group, and a molecular weight distribution increase ratio defined by Mathematical Equation 1 is 20% or less, and a method for preparing the same.
Claims14
A modified conjugated diene-based polymer comprising:
- a first chain comprising a repeating unit derived from a conjugated diene-based monomer;
- and
- one or more graft chains comprising a derived unit from an oligomer and graft-bonded to the first chain,
- wherein the derived unit from the oligomer comprises a residual group derived from a radical reactive functional group,
- the oligomer comprises:
- a repeating unit derived from an amino(meth)acrylate-based monomer;
- and a repeating unit derived from an aromatic vinyl-based monomer, and
- a molecular weight distribution increase ratio defined by the following Mathematical Equation 1 is 20% or less:
- Molecular weight distribution increase ratio (%)=[(PDI1/PDI2)×100]−100 [Mathematical Equation 1]
- in Mathematical Equation 1,
- PDI1 is molecular weight distribution of the modified conjugated diene-based polymer, and PDI2 is molecular weight distribution of the first chain.
Dependencies are inferred from the claim text.