Process, properties, and applications of graft copolymers
View Patent ↗A polymeric molecule having the formula: X—[C(A) 2 C(B)(B′)] n -Q[CY═C(Z)(Z′)] or [C(A) 2 =C(B)] n -Q[C(Y)(Y′)—C(Z)(Z′)]—X′, wherein A is either H or F; B and B′ are either H, F, or Cl, and are not necessarily the same; X and X′ are Br, Cl or I (and are not necessarily the same); Y and Y′ are F, Br, Cl or I (and are not necessarily the same); and wherein Z and Z′ are F, Br, Cl or I (and are not necessarily the same); Q is optional and is either oxygen (O) or sulfur (S); and n is at least 1.
1. A process for the synthesis of a X—[C(A) 2 C(B)(B′)] n —CY═C(Z)(Z′) molecule, wherein A is either H or F; B and B′ are either H, F, or Cl, and are not necessarily the same; X is Br, Cl or I; Y is F, Br, Cl or I; and wherein Z and Z′ are F, Br, Cl or I (and are not necessarily the same); and n is at least 1, the process comprising:
a) reacting a C(A) 2 C(B)(B′) taxogen and an X—C(Y)(Y′)—C(Z)(Z′)—X′ telogen in the presence of a free radical initiator, wherein Y′ is F, Br, Cl or I and wherein X′ is Br, Cl, or I, thereby forming a dihalogenated telomer having the formula:
X—[C(A) 2 C(B)(B′)] n —C(Y)(Y′)—C(Z)(Z′)—X′;
and
b) dehalogenating said dihalogenated telomer to form the molecule
X—[C(A) 2 C(B)(B′)] n —CY═C(Z)(Z′).
2. The process of claim 1 , wherein n is 1 to 10.
3. The process of claim 1 , wherein the free radical initiator comprises tert-butyl peroxypivalate or 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.
4. The process of claim 1 , wherein X and X′ are both Br, B is F, and B′ is F or Cl.
5. The process of claim 1 , wherein n is 2 to 10.