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NMR characterization of blends of poly(hydroxybutyrate– co ‐hydroxyvalerate) with poly(vinyl acetate)
Author(s) -
Hill David JT,
Markotsis Martin,
Whittaker Andrew K,
Wong Kathy W
Publication year - 2003
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1289
Subject(s) - vinyl acetate , differential scanning calorimetry , materials science , mixing (physics) , polymer , polymer blend , polymer chemistry , lamellar structure , diffusion , polyvinyl acetate , chemical engineering , characterization (materials science) , ethylene vinyl acetate , analytical chemistry (journal) , copolymer , composite material , organic chemistry , thermodynamics , chemistry , nanotechnology , physics , quantum mechanics , engineering
The extent of mixing in blends of poly(hydroxybutyrate‐ co ‐hydroxyvalerate) (PHBV) (27% HV) and poly(vinyl acetate) (PVAc) has been measured using a number of different techniques, principally solid‐state NMR. Differential scanning calorimetry DSC measurements indicated effective mixing of the polymer chains on a scale of several nanometres. The results of 1 H T 1 and 1 H T 1ρ measurements confirm intimate mixing of the chains. A change on blending in the 1 H T 1ρ , and the 1 H NMR line width of the signal from the protons of PVAc was consistent with an increase in the amplitude and frequency of motion of this component. The PVAc chains reside within the inter‐lamellar space, as confirmed by spin diffusion measurements after 1 H T 1ρ preparation. Copyright © 2003 Society of Chemical Industry