The synthesis and characterization of @entity20538 cellulose and thioacetyl cellulose is presented in this paper. Cellulose was first chemically modified with @entity68450 using @entity6442 ( @entity9104 ) as reaction medium. The maximum substitution of @entity3787 groups of cellulose was achieved reacting in the presence of 6equiv. of @entity68450 over 24h at 60  C. @entity9104 were then recovered by fractional distillation of the media. In the next step, @entity49289 cellulose was reacted with either @entity27036 or @entity1433 . The reactions were initially heterogeneous in hot @entity9104 . As the reactions proceeded, homogenous mixtures were obtained. Highly substituted cellulose derivatives were achieved via this method. The success of the reactions was confirmed by ATR-IR and NMR spectroscopy. Various pulps were used as cellulose source. The resulting products were found to be thermally stable and have glass transition temperatures around 120  C. Gel permeation chromatography (GPC) indicated that degradation of the cellulose backbone had occurred. The cellulose derivatives were then processed into films. Their potential, as packaging films, was then studied from the view-point of their moisture and @entity26 barrier properties, as well as their tensile properties.

Amination and thiolation of @entity49289 cellulose through reactive dissolution in XXXX .

@entity20538 :: ('CHEBI:46740', 'Chemical') :: ['aminoacetyl'] @entity49289 :: ('CHEBI:60669', 'Chemical') :: ['chloroacetyl'] @entity1433 :: ('MESH:D013438', 'Chemical') :: ['thiols'] @entity68450 :: ('MESH:C045557', 'Chemical') :: ['chloroacetyl chloride'] @entity27036 :: ('CHEBI:32863', 'Chemical') :: ['secondary amines'] @entity9104 :: ('CHEBI:17741', 'Chemical') :: ['DMF'] @entity26 :: ('MESH:D010100', 'Chemical') :: ['oxygen'] @entity3787 :: ('MESH:D017665', 'Chemical') :: ['hydroxyl'] @entity6442 :: ('MESH:D004126', 'Chemical') :: ['N,N-dimethylformamide']
@entity6442 :: (MESH:D004126,Chemical) :: ['N,N-dimethylformamide']
