Sulfur‐free lignins as composites of polypropylene films

Abstract

SYNOPSISTo elucidate the effect of lignin addition, polypropylene films containing 2-10 w t % of spruce organosolv lignin and/or beech wood prehydrolysis lignin were compared with lignin-free polymers with respect to tensile strength and elongation before and after aging. The physicochemical properties of the lignin-containing films were investigated by conductivity measurements, surface behavior, and UV and IR spectroscopy. 0

Radical scavenging capacity of lignin and its effect on processing stabilization of virgin and recycled polypropylene

“…Lignin ability to scavenge the radicals responsible for the oxidation is influenced by limited diffusion into polymer matrix. The incorporation of lower amounts of lignin derived from wood prehydrolysis and organosolv pulping allowed the preparation polypropylene films with acceptable mechanical properties 14 and to stabilize this material against photooxidation. 15 Pouteau et al characterized 15 lignin samples from the viewpoint of their antioxidant properties in polypropylene.…”

Natural antioxidants as stabilizers for polymers

“…Most of the attempts proved the antioxidant effect of lignin. The antioxidant and stabilizing characteristics of lignin have been studied in several polymers, but mainly in PE [153][154][155][156], PP [153,[157][158][159][160][161][162][163][164], PLA [165,166], poly(3-hydroxybutyrate) (PHB) [167], PCL [168] and in natural rubber [169,170].…”

“…Kosikova et al [158,159] examined the stabilizing efficiency of lignin in polypropylene and found that the source and type of the additive may change its effect from stabilization to the initiation of degradation. Later the authors [155] extended their work in order to specify the role of lignin in the degradation of PP and PE under different conditions.…”

Lignin as coupling agent in EPDM rubber: thermal and mechanical properties

“…The chemical modification of lignin used in the preparation of polyurethanes, acrylates, epoxies, polymer blends, and composites has also received considerable attention [17,18]. Kosikova et al [19] describe the influence of lignin addition to polypropylene (PP) on the mechanical properties of PP films, where lignin content varied up to 10 wt%. Recent advances from using lignin are to prepare green polymers [20,21].…”