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采用溶剂抽提与溶胀法研究了煤－煤及煤－溶剂间非共价键力对煤大分子溶胀行为的影响。煤在非极性溶剂中的溶胀行为反映了煤－煤分子间作用力的大小，煤在碳含量８１％～８３％范围内有最小的分子间作用力，溶胀率最大。煤在极性溶剂中的溶胀行为由煤－溶剂间作用强弱决定，其溶胀率随碳含量增加而减小。煤大分子交联键性质包括共价与非共价交联两部分的贡献。共价交联存在于结构单元之间，非共价交联主要存在于片断之间，部分存在于结构单元之间。
The effects of non-covalent bond forces between coal-coal and coal-solvent on the swelling behavior of coal were studied by solvent extraction and swelling methods. The swelling behavior of coal in non-polar solvents reflects the magnitude of the interaction between coal and coal. Coal has the smallest intermolecular force and the highest swelling rate in the range of 81% -83% of carbon content. The swelling behavior of coal in polar solvents is determined by the strength of coal-solvent interaction, and its swelling rate decreases with the increase of carbon content. The nature of cross-linking bonds of coal macromolecules includes the contribution of covalent and non-covalent cross-linking. Covalent cross-linking exists between the structural units, non-covalent cross-linking exists mainly between the fragments, partially between the structural units.