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Synthesis and characterization of amphiphilic hydroxypropylcellulose‐graft‐poly(ε‐caprolactone)
Author(s) -
Shi Ruiwen,
Burt Helen M.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12194
Subject(s) - differential scanning calorimetry , caprolactone , copolymer , polymer chemistry , materials science , amphiphile , polymerization , gravimetric analysis , chemical engineering , chemistry , polymer , composite material , organic chemistry , physics , engineering , thermodynamics
An amphiphilic graft copolymer, hydroxypropylcellulose‐graft‐poly(ε‐caprolactone) (HPC‐ g ‐PCL), was synthesized by bulk polymerization without a catalyst and characterized with one‐dimensional and two‐dimensional NMR spectroscopy. Molar substitution of ε‐caprolactone on HPC (MS CL ) was estimated by both gravimetry and 1 H‐NMR, and the gravimetric method was considered suitable for MS CL determination. Heterogeneity in the HPC‐ g ‐PCL film was suggested by a microscopic study, and the existence of PCL‐rich crystalline regions was confirmed by the results of X‐ray diffraction and differential scanning calorimetry (DSC). The double endotherm observed in the DSC scans of HPC‐ g ‐PCL was associated with the different molecular weight fractions in the copolymer. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 718–727, 2003