Macromolecular structure of coal

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5813369

Green, T K

Coals are considered to be three-dimensionally covalently crosslinked macromolecular networks. Solvent swelling techniques, modern polymer theories, and regular solution theory are applied to two bituminous coals in an effort to estimate their crosslink densities. The coals are observed to be extensively, internally hydrogen bonded. The hydrogen bonds serve as crosslinks between the macromolecular chains and contribute substantially to the structural integrity of the coals. Both coals obey the predictions of regular solution theory and their nonpolar solubility parameters (delta) are estimated to be 9.5 (cal/cm/sup 3/)/sup 1/2/. Flory interaction parameters (chi) were calculated for a series of nonpolar solvent-coal pairs. The Flory-Rehner and Kovac equations were then applied to the available data to estimate the crosslink densities of the coals.

• OSTI ID: 5813369
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL BONDS
COAL
DATA
DENSITY
ELEMENTS
ENERGY SOURCES
EQUATIONS
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
HYDROGEN
INFORMATION
MATERIALS
MEASURING METHODS
MOLECULAR STRUCTURE
NONMETALS
NUMERICAL DATA
PHYSICAL PROPERTIES
POLYMERS
PREDICTION EQUATIONS
SOLUBILITY