Abstract
Further study was carried out on the stereocomplex formation in dilute solution using viscometry, osmometry, light scattering and gel permeation chromatography. It appears that the process can be divided in two steps. The primary step involves the formation of very compact particles by association of several isotactic and syndiotactic PMMA chains in a base-molar ratio of 1 2 . The radius of gyration of these particles remains about the same as the additive value of the original components, whereas their molecular weight increases. The secondary step involves the aggregation of the particles which is reflected by an increase of the radius of gyration. It is proposed that this aggregation is caused by interparticle stereo-association of noncomplexed chain parts.
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