Structural, thermal, and mechanical properties of polyurethane foams prepared with starch as the main component of polyols

2007 ◽  
Vol 8 (2) ◽  
pp. 155-162 ◽  
Author(s):  
Dae-Hyun Kim ◽  
Oh-Jin Kwon ◽  
Seong-Ryul Yang ◽  
Jong-Shin Park ◽  
Byoung Chul Chun
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Main Component

Impact of blowing agent-blends on polyurethane foams thermal and mechanical properties

2020 ◽  
Author(s):  
Harith H. Al-Moameri ◽  
Baydaa Jaber Nabhan ◽  
Tawfeeq Wasmi M. ◽  
Mohammed Ali Abdulrehman
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Blowing Agent

Improvement of thermal and mechanical properties by control of formulations in rigid polyurethane foams from polyols functionalized with graphene oxide

2019 ◽  
Vol 136 (19) ◽  
pp. 47474 ◽  
Author(s):  
Mercedes Santiago‐Calvo ◽  
Victoria Blasco ◽  
Carolina Ruiz ◽  
Rodrigo París ◽  
Fernando Villafañe ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Rigid Polyurethane Foams

scholarly journals Chemically Functionalized Cellulose Nanocrystals as Reactive Filler in Bio-Based Polyurethane Foams

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2556
Author(s):  
Francesca Coccia ◽  
Liudmyla Gryshchuk ◽  
Pierluigi Moimare ◽  
Ferdinando de Luca Bossa ◽  
Chiara Santillo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Aqueous Media ◽  
Polyurethane Foams ◽  
Coupling Agents ◽  
Ftir Analysis ◽  
Thermal And Mechanical Properties ◽  
Efficient Coupling ◽  
Flexible Polyurethane ◽  
Pu Foams

Cellulose Nanocrystals, CNC, opportunely functionalized are proposed as reactive fillers in bio-based flexible polyurethane foams to improve, mainly, their mechanical properties. To overcome the cellulose hydrophilicity, CNC was functionalized on its surface by linking covalently a suitable bio-based polyol to obtain a grafted-CNC. The polyols grafted with CNC will react with the isocyanate in the preparation of the polyurethane foams. An attractive way to introduce functionalities on cellulose surfaces in aqueous media is silane chemistry by using functional trialkoxy silanes, X-Si (OR)3. Here, we report the synthesis of CNC-grafted-biopolyol to be used as a successful reactive filler in bio-based polyurethane foams, PUFs. The alkyl silanes were used as efficient coupling agents for the grafting of CNC and bio-polyols. Four strategies to obtain CNC-grafted-polyol were fine-tuned to use CNC as an active filler in PUFs. The effective grafting of the bio polyol on CNC was evaluated by FTIR analysis, and the amount of grafted polyol by thermogravimetric analysis. Finally, the morphological, thermal and mechanical properties and hydrophobicity of filled PUFs were thoughtfully assessed as well as the structure of the foams and, in particular, of the edges and walls of the cell foams by means of the Gibson–Ashby model. Improved thermal stability and mechanical properties of PU foams containing CNC-functionalized-polyol are observed. The morphology of the PU foams is also influenced by the functionalization of the CNC.

The effects of functional nanofillers on the reaction kinetics, microstructure, thermal and mechanical properties of water blown rigid polyurethane foams

Polymer ◽  
2018 ◽  
Vol 150 ◽  
pp. 138-149 ◽  
Author(s):  
Mercedes Santiago-Calvo ◽  
Josías Tirado-Mediavilla ◽  
José Luis Ruiz-Herrero ◽  
Miguel Ángel Rodríguez-Pérez ◽  
Fernando Villafañe
Keyword(s):  
Mechanical Properties ◽  
Reaction Kinetics ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Rigid Polyurethane Foams

scholarly journals Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams

2014 ◽  
Vol 215 (24) ◽  
pp. 2420-2429 ◽  
Author(s):  
Sayyeda M. Hasan ◽  
Jeffery E. Raymond ◽  
Thomas S. Wilson ◽  
Brandis K. Keller ◽  
Duncan J. Maitland
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Isophorone Diisocyanate ◽  
Shape Memory Polyurethane
Sign in / Sign up

Export Citation Format

Share Document