Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Aiga Ivdre"'
Autor:
Aiga Ivdre, Mikelis Kirpluks, Arnis Abolins, Laima Vevere, Beatrise Sture, Aigars Paze, Daniela Godina, Janis Rizikovs, Ugis Cabulis
Publikováno v:
Polymers, Vol 16, Iss 7, p 942 (2024)
The utilization of polyols derived from renewable sources presents an opportunity to enhance the sustainability of rigid polyurethane (PUR) foams, thereby contributing to the advancement of a circular bioeconomy. This study explores the development o
Externí odkaz:
https://doaj.org/article/2884d135018741bc85f95426b05d2b19
Autor:
Aiga Ivdre, Arnis Abolins, Nikita Volkovs, Laima Vevere, Aigars Paze, Raimonds Makars, Daniela Godina, Janis Rizikovs
Publikováno v:
Polymers, Vol 15, Iss 14, p 3124 (2023)
Developing polyols from biomass sources contributes to a more circular economy by replacing petroleum-based polyols in the vast production of polyurethanes (PUR). One such potential biomass source could be leftover birch bark from which suberinic aci
Externí odkaz:
https://doaj.org/article/5110eb278e5c40339ecfb6da02e0ce5c
Autor:
Aiga Ivdre, Arnis Abolins, Irina Sevastyanova, Mikelis Kirpluks, Ugis Cabulis, Remo Merijs-Meri
Publikováno v:
Polymers, Vol 12, Iss 4, p 738 (2020)
Developing polyols derived from natural sources and recycling materials attracts great interest for use in replacing petroleum-based polyols in polyurethane production. In this study, rigid polyurethane (PUR) foams with various isocyanate indices wer
Externí odkaz:
https://doaj.org/article/d5ec94686a1b4e41b19d7b44c93761cc
Publikováno v:
Engineering Structures and Technologies, Vol 9, Iss 2 (2017)
Paper waste sludge (PWS) is the main and the greatest by-product in paper production process, and its elimination as well as destruction is a primary environmental problem. This research explores the feasibility of such wastes to be used in polyureth
Externí odkaz:
https://doaj.org/article/4a0a15b06f064703ab27b1d9b3a49c2b
Publikováno v:
Polimery. 65:719-727
Two types of biopolyols based on tall oil were used for the preparation of rigid polyurethane (PUR) foams. High functionality biopolyol was synthesized from tall oil fatty acids by epoxidation and subsequent oxirane ring-opening with trimethylolpropa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ce287a775101fbc16f1181cf5576330
https://doi.org/10.14314/polimery.2020.10.7
https://doi.org/10.14314/polimery.2020.10.7
Publikováno v:
Journal of Cleaner Production. 183:760-771
This work presents the results in the field of materials engineering, and they are related to recycling of paper production waste sludge particles at amounts of 10 wt% and 20 wt% in tall oil polyol-based rigid polyurethane foam with and without tris
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76d2fe997d3177667f921a1abb8a3252
https://doi.org/10.1016/j.jclepro.2018.02.164
https://doi.org/10.1016/j.jclepro.2018.02.164
Publikováno v:
Key Engineering Materials. 762:300-305
Porous cordierite ceramic samples have been prepared by using 33% of two carbonate-containing illite clays as substitutes for the necessary synthetic ingredients. The changes of thermal (CTE) and mechanical properties (compressive strength, modulus o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2abc501e18fb412a4d668a77e52645dc
https://doi.org/10.4028/www.scientific.net/kem.762.300
https://doi.org/10.4028/www.scientific.net/kem.762.300
Autor:
Sergejs Gaidukovs, Gerda Gaidukova, Anrijs Verovkins, Anda Fridrihsone, Aiga Ivdre, Ugis Cabulis
Publikováno v:
Industrial Crops and Products. 102:133-143
We report the preparation of polyurethane (PU) rigid foams from bio-based and recycled components. Rapeseed oil (RO) and recycled polyethylene terephthalate (rPET) were used to synthesize PU polyols. Fifty-five percent of the content of the proposed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ed0dbf503222af909b0cd0c1f312b87
https://doi.org/10.1016/j.indcrop.2017.03.024
https://doi.org/10.1016/j.indcrop.2017.03.024
Autor:
Mirta Ines Aranguren, Ugis Cabulis, Aiga Ivdre, Veronica Lujan Mucci, Juan Manuel Buffa, Pablo Marcelo Stefani
Publikováno v:
Polymer Engineering & Science. 58:125-132
Cellulose nanocrystals (CNC) obtained by acidic hydrolysis from microcrystalline cellulose were dispersed in a biopolyurethane matrix to prepare composite films. The polyurethane was prepared from a hydroxylated soybean oil (SO-OH) and a polymeric di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccca3fde814c543eb5d0275467136d18
https://doi.org/10.1002/pen.24539
https://doi.org/10.1002/pen.24539
Publikováno v:
Journal of Cellular Plastics. 54:161-177
In this research, polyols from rapeseed oil and recycled poly(ethylene terephthalate) were synthesized by two-step continuous synthesis with a different rapeseed oil and poly(ethylene terephthalate) concentration. All rapeseed oil/poly(ethylene terep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1032e7e9420d51aee10dbd9cd743a20
https://doi.org/10.1177/0021955x16670585
https://doi.org/10.1177/0021955x16670585