syndiotactic polymer

syndiotactic polymer

[¦sin·dē·ə¦tak·tik ′päl·i·mər]
(organic chemistry)
A vinyl polymer in which the side chains alternate regularly above and below the plane of the backbone.
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References in periodicals archive ?
A syndiotactic polymer is a stereo-regular polymer made by a metallocene catalyst, which assembles "handed" monomers with pendant groups, or "thumbs," on alternating sides of the polymer chain, giving distinctive strength and clarity.
Polypropylenes (PP) synthesized using traditional Ziegler-Natta catalysts are generally about 95% isotactic, with a few percent atactic and some syndiotactic polymer.
And unlike conventional PP, syndiotactic PP reportedly is not degraded during reactive extrusion processing, so Sinclair thinks syndiotactic polymers could significantly improve performance of grafted PP adhesives and high-performance mineral-reinforced PP compounds and alloys.