2 research outputs found
Grafted Copolymerization Modification of Hemicellulose Directly in the Alkaline Peroxide Mechanical Pulping (APMP) Effluent and Its Surface Sizing Effects on Corrugated Paper
No full textIn
this work, the graft copolymerization of acrylamide (AM) and
methacryloyloxy ethyl trimethyl ammonium chloride (DMC) with the hemicellulose
in the alkaline peroxide mechanical pulping (APMP) effluent was investigated
using the Fenton agent (FeSO<sub>4</sub>/H<sub>2</sub>O<sub>2</sub>) as an initiator. The effects of the reaction conditions on the
characteristics of the graft copolymers were studied. On the basis
of the graft copolymer characterization, the optimum conditions were
as follows: total active ingredient concentration 31%, reactive temperature
50 °C, amount of the initiator 0.4%, ratio of H<sub>2</sub>O<sub>2</sub> to FeSO<sub>4</sub> 1:1, molar ratio of DMC to AM 1.5:20
and optimum percentages of <i>C</i>, <i>G</i>,
GE, and viscosity are 65%, 246%, 98%, and 5020 cP, respectively. Structure
elucidation of the graft copolymer was obtained by <sup>1</sup>H NMR
spectroscopy and FT-IR. Gel-permeation chromatography (GPC) was employed
to determine the molecular mass and molecular mass distribution of
hemicellulose and graft copolymer. The thermal degradation properties
of hemicellulose and the graft copolymers were measured by thermo
gravimetric analysis (TGA). The graft copolymer was subsequently used
as a corrugated paper surface sizing agent, which can significantly
improve the physical strength and water resistance of corrugated paper
Grafted Copolymerization Modification of Hemicellulose Directly in the Alkaline Peroxide Mechanical Pulping (APMP) Effluent and Its Surface Sizing Effects on Corrugated Paper
No full textIn
this work, the graft copolymerization of acrylamide (AM) and
methacryloyloxy ethyl trimethyl ammonium chloride (DMC) with the hemicellulose
in the alkaline peroxide mechanical pulping (APMP) effluent was investigated
using the Fenton agent (FeSO<sub>4</sub>/H<sub>2</sub>O<sub>2</sub>) as an initiator. The effects of the reaction conditions on the
characteristics of the graft copolymers were studied. On the basis
of the graft copolymer characterization, the optimum conditions were
as follows: total active ingredient concentration 31%, reactive temperature
50 °C, amount of the initiator 0.4%, ratio of H<sub>2</sub>O<sub>2</sub> to FeSO<sub>4</sub> 1:1, molar ratio of DMC to AM 1.5:20
and optimum percentages of <i>C</i>, <i>G</i>,
GE, and viscosity are 65%, 246%, 98%, and 5020 cP, respectively. Structure
elucidation of the graft copolymer was obtained by <sup>1</sup>H NMR
spectroscopy and FT-IR. Gel-permeation chromatography (GPC) was employed
to determine the molecular mass and molecular mass distribution of
hemicellulose and graft copolymer. The thermal degradation properties
of hemicellulose and the graft copolymers were measured by thermo
gravimetric analysis (TGA). The graft copolymer was subsequently used
as a corrugated paper surface sizing agent, which can significantly
improve the physical strength and water resistance of corrugated paper
