Controlled Morphology of Porous Polyvinyl Butyral Nanofibers

Table 1

HSP calculation for PVB using the Hoftyzer-Van Krevelen method.

Structural groups	No. of groups N [−]	N·𝐹d𝑖 [J^1/2·cm^3/2·mol^−1]	N·𝐹^2p𝑖 [J·cm^3·mol^−2]	N·𝐸h𝑖 [J·mol^−1]
–CH2–	5	1,350	0	0
=CH–	4	800	0	0
–O–	2	200	320,000	6,000
CH3–	1	420	0	0
OH–	1	210	250,000	20,000
	Sum	2,980	570,000	26,000
		𝛿d [MPa^1/2]	𝛿p [MPa^1/2]	𝛿h [MPa^1/2]
PVB		15.5	6.5	10.4