Karakterisasi lignin pinus pasca sadap=Characterization of sapped Pines(Pinus merkusii L.) lignin

Lignin of sapped pines was analyzed quantitatively as well as qualitatively. Quantitative method covered lignin contents, methoxyl constituent, lignin acidity, and ash components (according to ASTM), pure lignin constituent, water absorption, hydroxyl-phenolic, equivalent weight. Qualitative method consisted of Infrared spectrophotometer. The qualitative and quantitative analysis results showed that the lignin of sapped pines was a guaiasil type and possessed 43.94% of pure lignin component, low hydroxyl-phenolic content (1.41%). However, the methoxyl, water absorption, equivalent weight, acidic pH, and ash content were high i. e. 11.51%, 138.68%, 581.31, 3.45, and 15.87% respectively. Since lignin was impracticable as the main constituent for adhesive, consequently it must be added other materials such as phenol, melamine, and epoxy as co-reactant agent. Keywords: Lignin � binder ~ nature (basic characteristics