Polyurethane chemistry can yield diverse sets of polymeric materials exhibiting a wide range
of properties for various applications and market segments. Utilizing lignin as a polyol …

Density is an important parameter that influences the properties and performances of rigid
polyurethane foam (PUF). Rigid PUF with different densities were prepared by varying the …

Lignin is the second most abundant natural renewable polymer after cellulose. Natural lignin
is a phenolic polymer formed by radical coupling polymerization of three monolignols, and it …

The rigid polyurethane grout materials with different densities show elastoplastic or atypical
brittle characteristic, which will significantly affect their performance. To clarify these …

The rigid polyurethane foams (RPUFs) have been fabricated from high functional crude 4, 4'-
di-phenylmethane diisocyanate (CMDI) and polypropylene glycols (PPGs) for a wide range …

This study investigates the influence of air bubbles inclusion on the foaming of water blown
and water-pentane blown rigid polyurethane and polyisocyanurate foams. It was observed …

Bitumen source is a key factor in the development of new bituminous products, such as
dimensionally stable bituminous polyurethane foams, for building applications. With this aim …

Rigid polyurethane foams (RPUFs) are characterized by their excellent viable properties;
thus, these materials can be successfully used as thermal insulation materials. The main …

Rigid polyurethane foam (RPUF)/glass fiber composites have been fabricated from glass
fiber, polymeric 4, 4′-di-phenylmethane diisocyanate (PMDI) and polypropylene glycols …

Rigid polyurethane foams (RPUFs) were fabricated from crude MDI (CMDI) and
polypropylene glycols (PPGs) of various isocyanate indices with a physical blowing agent …