Two Approaches of Introduction of Wheat Straw Lignin in Rigid Polyurethane Foams
Main Authors: | Arshanitsa, Alexandr, Paberza, Aiga, Vevere, Laima, Cabulis, Ugis, Telysheva, Galina |
---|---|
Format: | Proceeding |
Bahasa: | eng |
Terbitan: |
, 2013
|
Online Access: |
https://zenodo.org/record/7555 |
Daftar Isi:
- Different separate approaches of CIMV lignin introduction into PUR foam system were studied: as filler without chemical preprocessing and as liquid lignopolyol obtained by lignin oxypropylation in alkali conditions. The incorporation of increasing amount of lignin as filler into reference PUR foam systems on the basis of mixture of commercial polyethers Lupranol 3300 and Lupranol 3422 steadily decreased the compression characteristics of foams, their dimensional stability and hydrophobicity. The complete substitution of Lupranol 3300 by lignopolyol increases its cell structure uniformity and dimensional stability and does not reduce the physical-mechanical properties of foam.