Studi pengaruh suhu dan komposisi 4,4 metilenbis sikloheksil isosianat terhadap karakteristik hibrida biopolimer kompatibiliser berbasis lignin dan poliutretan = The study of influence of temperature and composition 4 4 methylenebis cyclohexyl isocyanate to characteristics of hybrid compatibiliser biopolymer based on lignin and polyurethane