Polyvinylpolypyrrolidone Supported Brønsted Acidic Catalyst for Esterification

Table 1

Characterization data of PVPP, PVPP-BS, and PVPP-BSHSO₄.

Sample	S%	Acidity	BET surface area m^2/g
		mg/g
PVPP	–	–	3.84
PVPP-BS	4.121	–	6.28
PVPP-BSHSO	8.789	274.89	6.56

Weight percentage of S element determined by an elemental analyzer
Determined as KOH mass consumed for neutralization.