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Unique thermal behaviors of collective single and few‐chain compact globules of isotactic polystyrene
Author(s) -
Gu Fangming,
Bu Haishan
Publication year - 1999
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19991101)20:11<595::aid-marc595>3.0.co;2-d
Subject(s) - polystyrene , tacticity , differential scanning calorimetry , exothermic reaction , materials science , polymer chemistry , chain (unit) , thermal , chemical engineering , polymer , thermodynamics , chemistry , composite material , organic chemistry , physics , astronomy , engineering , polymerization
Collective single‐ and few‐chain compact globules of isotactic polystyrene (i‐PS) were prepared from very dilute solution via the freeze‐drying technique. A small exothermic peak was found in the differential scanning calorimetry (DSC) traces of freeze‐dried samples. This is a manifestation of the existence of ‘cohesional entanglements’.