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CAESURA Studies of Helical Jump Motions in Semi‐Crystalline Polymers
Author(s) -
Shao Limin,
Titman Jeremy J.
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700192
Subject(s) - jump , polymer , spinning , magic (telescope) , physics , tacticity , temperature jump , crystallography , materials science , chemistry , thermodynamics , polymer chemistry , nuclear magnetic resonance , polymerization , quantum mechanics
Applications of the CAESURA experiment to studies of helical jump motions in semi‐crystalline polymers are described. CAESURA is a recently proposed magic angle spinning exchange NMR experiment which provides detailed information about the timescale and geometry of molecular motions. The potential utility of CAESURA in studies of helical jump motions in a range semi‐crystalline polymers is illustrated using simulated data. In addition, a full experimental investigation of isotactic poly(propylene) is described which confirms the geometry of the helical jump motion and provides a measurement of the jump rate.