Isotactic polymers yog tsim los ntawm isotactic macromolecules (IUPAC txhais). Nyob rau hauv isotactic macromolecules tag nrho cov hloov pauv yog nyob ntawm tib sab ntawm macromolecular qaum. Ib qho isotactic macromolecule muaj 100% meso diads. Polypropylene tsim los ntawm Ziegler-Natta catalysis yog ib qho isotactic polymer.
Isotactic polymer nrog piv txwv yog dab tsi?
polypropylene . Tsuas yog daim ntawv isotactic ntawm polypropylene yog ua lag luam hauv ntau qhov tseem ceeb. (Nyob rau hauv isotactic polypropylene, tag nrho cov methyl [CH 3] pawg yog teem nyob rau tib sab ntawm lub polymer saw.)
Dab tsi yog isotactic thiab syndiotactic polymer?
Yog tias tag nrho cov methyl pawg pw ntawm tib sab ntawm cov saw, cov polymer hu ua isotactic. Yog hais tias cov methyl pawg sib hloov nyob rau hauv ib txwm zam los ntawm ib sab ntawm cov saw mus rau lwm yam, lub polymer yog syndiotactic. Thaum kawg, yog tias kev taw qhia ntawm pawg methyl yog random, cov polymer tau muab lub npe atactic.
txhais li cas los ntawm Tacticity ntawm polymer?
Tacticity tsuas yog txoj kev pendant pawg tau teeb tsa raws cov pob txha caj qaum ntawm cov polymer. … Cov pawg pendant zoo li taw tes rau ntawm cov saw hlau, zoo li qhov no: Hauv daim duab ntawd koj pom txhua pawg phenyl nyob rau tib sab ntawm cov saw hlau polymer.
YDab tsi yog isotactic syndiotactic thiabatactic?
Yog tias txhua lub chaw chiral muaj tib qhov kev teeb tsa, kev npaj ntawm pawg sab yog hu ua isotactic, thiab yog tias txhua qhov chaw chiral muaj tib txoj kev npaj, nws yog hu ua syndiotactic, whereas ib tug random kev npaj ntawm pawg sab yog hu ua atactic los yog heterotactic.
