Copolymers, block 2-oxazoline derived

Scheme 1 shows the "One-pot Two-stage" process to produce AB type block copolymer, in which the first monomer is MeOZO and the second one is a 2-oxazoline derivative having a medium to higher alkyl or phenyl group. 

In the preceding section we have disscussed the influence of monomer nucleophilicity on copolymerization behaviour. Only monomers of similar nucleophilicities can be randomly copolymerized. Attempted simultaneous copolymerization of e.g. amines with ethers, and sulfides or oxazolines with ethers gives homopolymers of the more nucleophilic monomer. However, stepwise addition of a more basic comonomer to a living polymer derived from the less nucleophilic heterocycle yields block copolymers (cf. Sect. 15.3.1.2). 

Binder, W.H. and Gruber, H. (2000) Block copolymers derived from photoreactive 2-oxazolines. 1. Synthesis and miceUization behavior. Macromol. Chem. Phys., 201(9), 949-957. 

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