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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of Kraft lignin and palm kernel oil as substitutes of petroleum-based polyols on the properties of viscoelastic polyurethane foams

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Author(s):
Flores, Camila C. [1, 2] ; Rufino, Thiago do C. [2] ; Oliveira, Mauricio P. [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Paulo, Dept Sci & Technol, Lab Polymer Synth & Proc, Sao Jose Dos Campos, SP - Brazil
[2] Dow Brazil, Lab Dev & Applicat Polyurethane, Av Andre Costa, BR-2201 Jundiai, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF POLYMER RESEARCH; v. 28, n. 12 DEC 2021.
Web of Science Citations: 0
Abstract

Viscoelastic polyurethane (VE-PU), also known as memory foams are petroleum-based materials widely used in industry due to their specific properties, such as, comfort and low resilience. In this study, VE-PU foams were produced using different contents of Kraft lignin (KL) and palm kernel oil (PKO) additives, as partial substitutes of petroleum-based polyols. The study intends to replace methoxy-poly(ethylene glycol) (mPEG) with KL and PKO in the VE-PU formulation and to investigate the consequent effects on the foam growth profile, foaming reactivity and final properties of VE-PU foams (e.g., cell morphology, indentation strength, resilience, recovery time, deformation and sensory effect). The results indicate that it is possible to produce VE-PU foams by adding KL and PKO as additive to replace petroleum-based polyols. The addition of PKO and KL dispersed in petroleum-based polyol from 0 to 15wt%, had a significant effect on the growth profile, foaming reactivity and consequently on the foam morphology. The appearance of the VE-PU foams produced with PKO was similar to the control VE-PU foam sample. The foams with larger cells, induced densification and changes in the indentation strength, resilience and compression set test. Thermal properties of VE-PU foams showed a direct relationship to the content of KL used. The VE-PU foam with different PKO contents did not necessarily result in obtaining a foam with tactile sensory attributes. Mechanical properties of VE-foams can be adjusted by making changes to the standard formulation. In addition, these results point to a new approach for the application of VE-PU foams for packaging applications, as well as in the mattress industry. (AU)

FAPESP's process: 18/12469-7 - Production of pressure sensitive adhesives (PSA) via emulsion and miniemulsion polymerization of farnecene for manufature of adhesive tapes
Grantee:Dayane Batista Tada
Support Opportunities: Regular Research Grants