Studies on the effects of kaolin filler concentrations on the thermal and mechanical performance of furan–lignin foam formulations. J. Nig. Soc. Phys. Sci. [Internet]. 2026 Jul. 29 [cited 2026 Jul. 30];8(3):3355. Available from: https://journal.nsps.org.ng/index.php/jnsps/article/view/3355