Gradient copolymers synthesized

Table 9.22 Statistical/Gradient Copolymers Synthesized by RAFT Polymerization...

FIGURE 13.19 Molecular structure of gradient copolymers synthesized by Ribaut et al. [36]. 

M /g.mol = 63200, 10.8 mol% acetoacetoxyethyl methacrylate, gradient copolymer, synthesized in the laboratory carbon dioxide CO2 124-38-9... 

The ability to synthesize a wide variety of architectures such as telechelic, block copolymers, graft copolymers, gradient copolymers, nanogels, stars, and dendritic structures. " - ... 

It is clear that the storage modulus in the mbber plateau region is lower for the copolymer than for the corresponding homopolymer in all cases. In the same study, block copolymers and gradient copolymers were synthesized and... 

Copolymers form an extremely interesting class of polymers. The faa that they are composed of more than one monomer repeat unit provides additional degrees of freedom over homopolymers. Already in the early days of synthetic polymers, this meant that polymer properties could easily he tuned by adjrrst-ing the ratio of the monomers. With the introduaion of LRP techniques, the possibilities to tune properties of copolymers further expanded. Special effects in terms of phase separation and stimuli-responsive effects can be introduced. The flexibility of conventional radical copolymerization is largely retained, but new structures such as gradient copolymers can be synthesized. 

Due to the high level of end-group functionality and the lifetime of the polymer chains, NMP is an attractive methodology for synthesizing not only homopolymers but also block copolymers and well-defined gradient copolymers. 

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