Heat-insulating properties of rigid polyurethane foams synthesized with use of vegetable oils - based polyols

Polimery ◽  
2008 ◽  
Vol 53 (05) ◽  
pp. 195-200 ◽  
Author(s):  
ALEKSANDER PROCIAK
Keyword(s):  
Vegetable Oils ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams ◽  
Insulating Properties

scholarly journals Application of vegetable oil-based biopolyols in manufacturing of rigid polyurethane foams – short review

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Aleksander Hejna
Keyword(s):  
Sustainable Development ◽  
Vegetable Oil ◽  
Vegetable Oils ◽  
Renewable Resources ◽  
Short Review ◽  
Paper Analysis ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams ◽  
The Future

The development of polyurethane foams’ market, as well as ongoing trends associated with sustainable development cause increasingly growing interest in the utilization of materials from renewable resources. Great example of such phenomenon is the use of vegetable oils in manufacturing of foamed polyurethanes. These materials can be applied directly or after previous modifications in production of biopolyols, main constituents of polyurethanes. In this paper, analysis of polyurethane foams’ market was presented and forecasts pointing to the potentially increasing position of so-called bio-polyurethanes in the future. Moreover, this paper summarizes previously published reports related to the manufacturing of vegetable oil-based biopolyols and their further incorporation into formulations of rigid polyurethane foams.

Rigid polyurethane foams modified with borate and oxamide groups – Preparation and properties

2020 ◽  
pp. 0021955X2094309
Author(s):  
Iwona Zarzyka ◽  
Tomasz Pacześniak ◽  
Wiesław Frącz
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Propylene Carbonate ◽  
Polyurethane Foams ◽  
Diphenylmethane Diisocyanate ◽  
Foam Structure ◽  
Rigid Polyurethane Foams ◽  
Dimension Stability ◽  
Insulating Properties ◽  
Good Heat

In this work the results of the research on modification of rigid polyurethane foams properties by new polyols with borate and oxamide groups have been presented. Propylene glycols — the products of hydroxyalkylation of N,N′-bis(2-hydroxypropyl)oxamide bis(dihydrogenborate) by excess of propylene carbonate (PC) was used as a polyol component. The new polyols have been foamed using polymeric 4,4′-diphenylmethane diisocyanate, water and triethylamine. The modification of the foam structure by oxamide and borate groups guarantees their low water uptake, very good heat-insulating properties, good dimension stability and decreases their flammability, and does not worsen their mechanical properties and thermal stability.

Preparation and Characterization of Soybean Oil-based Flame Retardant Rigid Polyurethane Foams Containing Phosphaphenanthrene Groups

2020 ◽  
Vol 17 (10) ◽  
pp. 760-771
Author(s):  
Qirui Gong ◽  
Niangui Wang ◽  
Kaibo Zhang ◽  
Shizhao Huang ◽  
Yuhan Wang
Keyword(s):  
Soybean Oil ◽  
Flame Retardant ◽  
Chemical Structure ◽  
Cell Structure ◽  
Polyurethane Foams ◽  
Limiting Oxygen Index ◽  
Rigid Polyurethane Foams ◽  
Degradation Activation Energy ◽  
Ft Ir

A phosphaphenanthrene groups containing soybean oil based polyol (DSBP) was synthesized by epoxidized soybean oil (ESO) and 9,10-dihydro-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Soybean oil based polyol (HSBP) was synthesized by ESO and H2O. The chemical structure of DSBP and HSBP were characterized with FT-IR and 1H NMR. The corresponding rigid polyurethane foams (RPUFs) were prepared by mixing DSBP with HSBP. The results revealed apparent density and compression strength of RPUFs decreased with increasing the DSBP content. The cell structure of RPUFs was examined by scanning electron microscope (SEM) which displayed the cells as spherical or polyhedral. The thermal degradation and flame retardancy of RPUFs were investigated by thermogravimetric analysis, limiting oxygen index (LOI), and UL 94 vertical burning test. The degradation activation energy (Ea) of first degradation stage reduced from 80.05 kJ/mol to 37.84 kJ/mol with 80 wt% DSBP. The RUPF with 80 wt% DSBP achieved UL94 V-0 rating and LOI 28.3. The results showed that the flame retardant effect was mainly in both gas phase and condensed phase.

Improvement of thermal conductivity of rigid polyurethane foams with aluminum nitride filler

2021 ◽  
pp. 026248932198897
Author(s):  
Serife Akkoyun ◽  
Meral Akkoyun
Keyword(s):  
Thermal Conductivity ◽  
Aluminum Nitride ◽  
Polyurethane Foams ◽  
Thermal Transitions ◽  
Rigid Polyurethane Foams ◽  
Noticeable Increase ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Step Procedure ◽  
Electrical Conductivities

The aim of this work is the fabrication of electrically insulating composite rigid polyurethane foams with improved thermal conductivity. Therefore, this study is focused on the effect of aluminum nitride (AlN) on the thermal and electrical conductivities of rigid polyurethane foams. For this purpose, aluminum nitride/rigid polyurethane composite foams were prepared using a three-step procedure. The electrical and thermal conductivities of the foams were characterized. The thermal transitions, mechanical properties and morphology of the foams were also examined. The results reveal that AlN induces an increase of the thermal conductivity of rigid polyurethane foam of 24% which seems to be a relatively noticeable increase in polymeric foams. The low electrical conductivity of the foams is preserved.

Morphology and Mechanical Properties of Nylon-1010-filled Rigid Polyurethane Foams

2004 ◽  
Vol 36 (4) ◽  
pp. 333-349 ◽  
Author(s):  
Bo Yin ◽  
Zhong-Ming Li ◽  
Hui Quan ◽  
Ming-Bo Yang ◽  
Qiu-Ming Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams ◽  
Nylon 1010 ◽  
Morphology And Mechanical Properties

scholarly journals Polymers and Environment II. General Purpose Adhesives Prepared from Chemically Decomposed Waste Rigid Polyurethane Foams.

1993 ◽  
Vol 50 (11) ◽  
pp. 847-853 ◽  
Author(s):  
Shuchang XUE ◽  
Feifeng HE ◽  
Mituru OMOTO ◽  
Takao HIDAI ◽  
Yoshio IMAI
Keyword(s):  
General Purpose ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams

Effects of a novel phosphorus–nitrogen flame retardant on rosin-based rigid polyurethane foams

2015 ◽  
Vol 120 ◽  
pp. 427-434 ◽  
Author(s):  
Meng Zhang ◽  
Zhenyang Luo ◽  
Jinwen Zhang ◽  
Shuigen Chen ◽  
Yonghong Zhou
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams
Sign in / Sign up

Export Citation Format

Share Document