Karakteristik hibrida poliuretan berbasis lignin sebagai kompatibeliser pada variasi berat molekul polietilen glikol PeG dan MoL 4.4 metilenbis sikloheksil isosianat (HMDI) = Characteristic of polyurethanes hybride based on lignin as compatibilizer to the variety of molecular weight polyethylen glycol peg and mole of 4 4 methylenebis cyclohexyl isocyanate (HMDI)