scholarly journals Nanostructured rigid polyurethane foams with improved specific thermo‐mechanical properties using bacterial nanocellulose as a hard segment

2021 ◽  
pp. 50520
Author(s):  
Sofía Benavides ◽  
Franco Armanasco ◽  
Patricia Cerrutti ◽  
Leonel Matías Chiacchiarelli
Keyword(s):  
Mechanical Properties ◽  
Hard Segment ◽  
Polyurethane Foams ◽  
Bacterial Nanocellulose ◽  
Rigid Polyurethane Foams

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

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

2019 ◽  
Vol 137 (20) ◽  
pp. 48701 ◽  
Author(s):  
Leonel Matías Chiacchiarelli ◽  
Patricia Cerrutti ◽  
Emmanuel A. Flores‐Johnson
Keyword(s):  
Polyurethane Foams ◽  
Strain Rates ◽  
Compressive Behavior ◽  
Bacterial Nanocellulose ◽  
Rigid Polyurethane Foams ◽  
Intermediate Strain Rates

scholarly journals Composites of Rigid Polyurethane Foams Reinforced with POSS

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 336 ◽  
Author(s):  
Sylwia Członka ◽  
Anna Strąkowska ◽  
Krzysztof Strzelec ◽  
Agnieszka Adamus-Włodarczyk ◽  
Agnė Kairytė ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Water Absorption ◽  
Viscoelastic Behavior ◽  
Physical And Mechanical Properties ◽  
Polyurethane Foams ◽  
Bending Test ◽  
Mechanical And Thermal Properties ◽  
Rigid Polyurethane Foams ◽  
Cell Shapes

Rigid polyurethane foams (RPUFs) were successfully modified with different weight ratios (0.5 wt%, 1.5 wt% and 5 wt%) of APIB-POSS and AEAPIB-POSS. The resulting foams were evaluated by their processing parameters, morphology (Scanning Electron Microscopy analysis, SEM), mechanical properties (compressive test, three-point bending test and impact strength), viscoelastic behavior (Dynamic Mechanical Analysis, DMA), thermal properties (Thermogravimetric Analysis, TGA, and thermal conductivity) and application properties (contact angle, water absorption and dimensional analysis). The results showed that the morphology of modified foams is significantly affected by the type of the filler and filler content, which resulted in inhomogeneous, irregular, large cell shapes and further affected the physical and mechanical properties of resulting materials. RPUFs modified with APIB-POSS represent better mechanical and thermal properties compared to the RPUFs modified with AEAPIB-POSS. The results showed that the best results were obtained for RPUFs modified with 0.5 wt% of APIB-POSS. For example, in comparison with unfilled foam, compositions modified with 0.5 wt% of APIB-POSS provide greater compression strength, better flexural strength and lower water absorption.

Tailoring Mechanical Properties of Rigid Polyurethane Foams by Sorbitol and Corn Derived Biopolyol Mixtures

2015 ◽  
Vol 3 (12) ◽  
pp. 3382-3387 ◽  
Author(s):  
Lorena Ugarte ◽  
Sandra Gómez-Fernández ◽  
Cristina Peña-Rodrı́uez ◽  
Aleksander Prociak ◽  
Maria Angeles Corcuera ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams

Surface-modifiers of clay on mechanical properties of rigid polyurethane foams/organoclay nanocomposites

2007 ◽  
Vol 105 (5) ◽  
pp. 2988-2995 ◽  
Author(s):  
Zhongbin Xu ◽  
Xiling Tang ◽  
Aijuan Gu ◽  
Zhengping Fang ◽  
Lifang Tong
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams ◽  
Surface Modifiers

Inherently flame-retardant rigid polyurethane foams with excellent thermal insulation and mechanical properties

Polymer ◽  
2018 ◽  
Vol 153 ◽  
pp. 616-625 ◽  
Author(s):  
Shui-Xiu Wang ◽  
Hai-Bo Zhao ◽  
Wen-Hui Rao ◽  
Sheng-Chao Huang ◽  
Ting Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Thermal Insulation ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams

In‐situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose

2021 ◽  
pp. 51824
Author(s):  
Tomás Joaquin Diaz ◽  
Patricia Cerrutti ◽  
Leonel Matías Chiacchiarelli
Keyword(s):  
Thermal Aging ◽  
Polyurethane Foams ◽  
Bacterial Nanocellulose ◽  
Rigid Polyurethane Foams

scholarly journals Thermal and mechanical performance of rigid polyurethane foam added with commercial nanoparticles

2017 ◽  
Vol 7 ◽  
pp. 184798041668411 ◽  
Author(s):  
Caterina Lorusso ◽  
Viviana Vergaro ◽  
Francesca Conciauro ◽  
Giuseppe Ciccarella ◽  
Paolo Maria Congedo
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Scale Up ◽  
Polyurethane Foams ◽  
Average Cell Size ◽  
Average Cell ◽  
Rigid Polyurethane Foams ◽  
Different Types ◽  
Automotive Production ◽  
Clay Nanotubes

This study investigates the effects of commercial nanoparticles on thermal and mechanical performance of rigid polyurethane foams. Two different types of nanoparticles are considered as fillers, spherical titania and rod-shaped halloysite clay nanotubes. The aim of this study was to produce rigid polyurethane foams modified with titania nanocrystals and nanohalloysite in order to obtain polyurethanes with improved properties. The laboratory scale-up will be suitable for the production in many branches of industry, such as construction and automotive production. In particular, these foams, added with commercial nanoparticles, characterized by better thermal and mechanical properties, are mainly used in construction for thermal insulation of buildings. The fillers were dispersed in the components, bringing rates up to 10%. In these investigations, the improvement of the thermal properties occurs by adding nanoparticles in the range 4–8% of titania and halloysite. The mechanical properties instead have been observed an improvement starting from 6% of nanoparticles addition. All data are in agreement with scanning electron microscope observations that shown a decrease in the average cell size and an increase in the cell density by adding nanoparticles in foams.

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