Modification method of substrate surface, and composition and polymer
A modification method of a surface of a substrate includes: applying a composition on a surface of a metal substrate, and heating a coating film formed by the applying, wherein the composition contains: a polymer having a first structural unit that includes an aromatic ring, and a second structural unit that includes an ethylenic double bond; a thermal acid generating agent; and a solvent, wherein the polymer has a functional group capable of bonding to a metal atom in the metal substrate.
1. A method of modifying a surface of a substrate, comprising:
applying a composition on a surface of a metal substrate such that a coating film is formed; and
heating the coating film,
wherein the composition comprises:
a polymer that comprises a first structural unit comprising an aromatic ring, and a second structural unit;
a thermal acid generating agent; and
a solvent,
wherein
the polymer comprises a functional group capable of bonding to a metal atom in the metal substrate,
the functional group is a mercapto group, and
the second structural unit has formula (2-2)
where R B to R F each independently are a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 20 carbon atoms; R X is a single bond or a divalent organic group having 1 to 20 carbon atoms; and R Y , R Z and R W each independently are a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 20 carbon atoms.
2. The method according to claim 1 , wherein the polymer comprises a group that comprises the functional group at an end of a main chain or at an end of a side chain.
3. The method according to claim 1 , wherein the first structural unit is derived from a substituted or unsubstituted styrene.
4. The method according to claim 1 , wherein a proportion of the second structural unit in the polymer is no greater than 50 mol %.
5. The method according to claim 1 , wherein the second structural unit is derived from myrcene.
6. A composition, comprising:
a polymer that comprises a first structural unit comprising an aromatic ring, and a second structural unit;
a thermal acid generating agent; and
a solvent,
wherein
the polymer comprises a functional group that is capable of bonding to a metal atom in the metal substrate, the functional group is a mercapto group, and the second structural unit has formula (2-2)
where R B to R F each independently are a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 20 carbon atoms; R X is a single bond or a divalent organic group having 1 to 20 carbon atoms; and R Y , R Z and R W each independently are a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 20 carbon atoms.
7. A polymer, comprising:
a structural unit comprising an aromatic ring, and a structural unit comprising an ethylenic double bond, and
a group that comprises a functional group capable of bonding to a metal atom at an end of a main chain or at an end of a side chain,
wherein the functional group is a mercapto group,
the structural unit comprising an ethylenic double bond is represented by formula (2-2):
where R B to R F each independently represent a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 20 carbon atoms; R X represents a single bond or a divalent organic group having 1 to 20 carbon atoms; and R Y , R Z and R W each independently represent a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 20 carbon atoms.
8. The polymer according to claim 7 , wherein the structural unit of the formula (2-2) is derived from myrcene.
9. The polymer according to claim 7 , wherein the structural unit comprising an aromatic ring is derived from a substituted or unsubstituted styrene.
10. The polymer according to claim 7 , wherein a proportion of the structural unit of the formula (2-2) in the polymer is from 0.1 mol % to 50 mol %.
11. The polymer according to claim 7 , wherein a proportion of the structural unit of the formula (2-2) in the polymer is from 8 mol % to 20 mol %.
12. The composition according to claim 6 , wherein the second structural unit is derived from myrcene.
13. The composition according to claim 6 , wherein the first structural unit is derived from a substituted or unsubstituted styrene.
14. The composition according to claim 6 , wherein a proportion of the second structural unit in the polymer is from 0.1 mol % to 50 mol %.
15. The composition according to claim 6 , wherein a proportion of the second structural unit in the polymer is from 8 mol % to 20 mol %.
16. The method according to claim 1 , wherein a proportion of the second structural unit in the polymer is from 8 mol % to 20 mol %.