Determination Of Hydroxy Terminated Polybutadiene In The Blends By Liquid Critical Condition Chromatography

A method based on liquid critical condition chromatography (LCCC) was established for the quantification of hydroxy-terminated polybutadiene (HTPB) in polymer blends. The critical conditions for HTPB were investigated using a C18 column as the stationary phase, and tetrahydrofuran (THF)-acetonitrile (ACN) or THF-water as the mobile phase. Irrespective of the relative molecular mass, HTPB was eluted under the critical conditions of THF. ACN (70. 7 : 29. 3, v / v) or THF. water (92 :8, v / v). Under the optimal conditions, the HTPB exhibited satisfactory linearity in the range of 46. 7- 216. 4 mg / L, with a correlation coefficient (r) of 0. 997. The limit of detection reached 4. 2 mg / L. The recoveries of HTPB from the prepared mixtures of HTPB and mineral oil ranged from 89. 2% to 101. 1%, with a relative standard derivation of less than 0. 66% (n = 6). This method was successfully applied to the quantitative analysis of HTPB in a commercial polyurethane adhesive, and 26. 6% of HTPB was detected in the product. This LCCC method is simple, convenient, highly selective, and reliable for quality control and failure studies of formulated products.