Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Properties of the liquids and the relative swelling ratio of the samples swollen by those liquids

Liquids		Structural formula	Molar volumes [cm³/mol]	P.A.P.Δv^a [cm⁻¹]	H-bonding properties	C.E.^d [cal/cm³]	Relative swelling^e [%]
Methanol	MeOH	CH₃OH	40.7	187	AD^b	204	89.7
Ethanol	EtOH	C₂H₅OH	58.5	187	AD	166	82.5
2-Propanol	PrOH	(CH₃)₂CHOH	75.0	187	AD	144	73.6
1-Butanol	BuOH	CH₃CH₂CH₂CH₂OH	91.8	187	AD	128	63.0
Acetone	Act	CH₃COCH₃	74.0	64	A^c	96	68.0
Methyl ethyl ketone	MEK	CH₃CH₂COCH₃	90.2	57	A	86	56.0
Toluene	Tol	C₆H₅CH₃	106.4	45	A	79	0.9
Ethylene glycol	EG	HOCH₂CH₂OH	55.8	206	AD	266	111.2
Formamide	FA	HCONH₂	39.7		AD	317	116.8
Dimethyl sulfoxide	DMSO	(CH₃)₂SO	70.9	141	A	166	133.0
Water	Water	H₂O	18.0	390	AD	552	100.0

^a Proton accepting powers: The data are cited from a table of Kagiya et al. [22], Crowley et al. [23], and Ishimaru et al. [24]. ^b Liquid having both proton accepting and donating properties for hydrogen bonding. ^c Liquid having only proton accepting properties for hydrogen bonding. ^d Cohesion energy: the data are calculated from the solubility parameter values in a table by Hansen [25]. ^e Relative swelling compared with that in water: The data are cited from a table of Sakai et al. [26] and Ishimaru et al. [27]