isotacticadj.
/ʌɪsəʊˈtaktɪk/ Chemistry.
Having or designating a polymeric structure in which all the repeating units have the same stereochemical configuration.
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the world > matter > chemistry > polymer chemistry > polymers > [adjective] > stereochemical properties
volumeless1946
isotactic1955
syndiotactic1956
stereoregular1959
stereoregulated1959
stereoregulating1959
stereospecific1959
1955 Chem. Abstr. 49 12912 The designation ‘isotactic’ is applied to chain polymers contg. alternating CH2 and asym. C groups of identical configuration.
1963 Times 11 June 19/1 The entry into production of the Brindisi plant..considerably increased output of the isotactic polypropylene plastic (‘Moplen’), now becoming popular in many countries throughout the world.
1964 New Scientist 23 Jan. 225 These arrangements, known as ‘isotactic’ and ‘syndiotactic’ configurations.., have now been realised with most of the common vinyl monomers.
1972 Physics Bull. Nov. 666/1 Isotactic polypropylene is a useful commercial plastic noted for its high strength/weight ratio.
Derivatives
isotacˈticity n. the quality of being isotactic.
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the world > matter > chemistry > polymer chemistry > polymers > [noun] > stereo-chemical properties > isotacticity
isotacticity1959
1959 Natta & Danusso in Jrnl. Polymer Sci. XXXIV. 7 All the arrangements which may compose the isotacticity must be only repetitive arrangements.
1968 Jrnl. Polymer Sci. A-2. 6 1495 The isotacticity and the crystallizability of the original sample remain unchanged after degradation.
This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).
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adj.1955