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Journal articles
Open Access
Recycling old telephone directories, TAPPI JOURNAL, January 2001, Vol. 84(1)

Recycling old telephone directories, TAPPI JOURNAL, January 2001, Vol. 84(1)

Journal articles
Open Access
Canadian industry: 1996 review, TAPPI JOURNAL, January 1997, Vol. 80(1)

Canadian industry: 1996 review, TAPPI JOURNAL, January 1997, Vol. 80(1)

Journal articles
Open Access
Outsourcing providers, TAPPI JOURNAL, February 1997, Vol. 80(2)

Outsourcing providers, TAPPI JOURNAL, February 1997, Vol. 80(2)

Journal articles
Open Access
NO2 treatment of kraft pulp followed by oxygen bleaching influence of black liquor, TAPPI JOURNAL, February 1990, Vol. 73(2)

NO2 treatment of kraft pulp followed by oxygen bleaching influence of black liquor, TAPPI JOURNAL, February 1990, Vol. 73(2)

Journal articles
Open Access
Low-chlorine bleaching with nitrosylsulfuric acid pretreatment, TAPPI JOURNAL, October 1991, Vol. 74(10)

Low-chlorine bleaching with nitrosylsulfuric acid pretreatment, TAPPI JOURNAL, October 1991, Vol. 74(10)

Journal articles
Open Access
Treating bleaching effluent for suspended solids and color, TAPPI JOURNAL September 1989

Treating bleaching effluent for suspended solids and color, TAPPI JOURNAL September 1989

Magazine articles
Open Access
Highly corrosion-resistant metals for the pulp and paper industry, TAPPI JOURNAL, March 1991, Vol. 74(3)

Highly corrosion-resistant metals for the pulp and paper industry, TAPPI JOURNAL, March 1991, Vol. 74(3)

Journal articles
Magazine articles
Open Access
Probing the molecular weights of sweetgum and pine kraft lignin fractions, TAPPI Journal June 2021

ABSTRACT: The present investigation undertook a systematic investigation of the molecular weight (MW) of kraft lignins throughout the pulping process to establish a correlation between MW and lignin recovery at different extents of the kraft pulping process. The evaluation of MW is crucial for lignin characterization and utilization, since it is known to influence the kinetics of lignin reactivity and its resultant physico-chemical properties. Sweetgum and pine lignins precipitated from black liquor at different pHs (9.5 and 2.5) and different extents of kraft pulping (30•150 min) were the subject of this effort. Gel permeation chromatography (GPC) was used to determine the number average molecular weight (Mn), mass average molecular weight (Mw), and polydispersity of the lignin samples. It was shown that the MW of lignins from both feedstocks follow gel degradation theory; that is, at the onset of the kraft pulping process low molecular weight-lignins were obtained, and as pulping progressed, the molecular weight peaked and subsequently decreased. An important finding was that acetobromination was shown to be a more effective derivatization technique for carbohydrates containing lignins than acetylation, the technique typically used for derivatization of lignin.

Journal articles
Open Access
Techniques for expanding the sphere of statistical process control, TAPPI JOURNAL July 1988

Techniques for expanding the sphere of statistical process control, TAPPI JOURNAL July 1988

Journal articles
Open Access
Ethylene-carbon monoxide extrudable adhesive copolymers for polyvinylidene chloride, June 1988, TAPPI Journal 88JUN140

Ethylene-carbon monoxide extrudable adhesive copolymers for polyvinylidene chloride, TAPPI JOURNAL June 1988

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