Photoinduced Formation and Growth of Polymer Crystals

Photoinduced solid-state polymerization reaction is useful for producing a single large crystal. Polydiacety- [Pg.191]

Fignie 5.28 Molecular shapes of poly(diethyl cw,cw-muco-nate) and the corresponding monomers in the crystal lattice [130]. The space group symmetry (P2i/c) between them is preserved during the photoinduced solid-state polymerization process. (See color insert.) [Pg.191]

We show an example of the case of poly(l,4- diethyl c/s,cis-muconate). We prepare a single crystal of 1,4-diethyl cw,cw-muconate from the solution and irradiate with the X-ray beam for the structure analysis of the monomer and the polymer. Since the structural changes occur rapidly during the polymerization reaction, that is, on a time scale of several tens of minutes under the X-ray irradiation, fast acquisition of the X-ray reflections is necessary for accurate structural analysis. A CCD camera makes it possible to collect about 6(XX) reflections in 13 minutes [130]. [Pg.191]

We have reviewed the complex growth of polymer crystals occurring under various conditions by using the data acquired at different levels of structural detail. The mechanism of growth was measured by using a single (or a combination) of the tools available. We suggest that the results of simultaneous measurements clarify [Pg.192]

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