scholarly journals Chemical and Thermo-Mechanical Properties of Waterborne Polyurethane Dispersion Derived from Jatropha Oil

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 795
Author(s):  
Sariah Saalah ◽  
Luqman Chuah Abdullah ◽  
Min Min Aung ◽  
Mek Zah Salleh ◽  
Dayang Radiah Awang Biak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Film Formation ◽  
Consumer Preference ◽  
Waterborne Polyurethane ◽  
Crosslinking Density ◽  
Jatropha Oil ◽  
Free Standing ◽  
Polyurethane Dispersion ◽  
Total Volatile Organic Compounds ◽  
Polyurethane Dispersions

Nowadays, there is a significant trend away from solvent-based polyurethane systems towards waterborne polyurethane dispersions due to government regulations requiring manufacturers to lower total volatile organic compounds, as well as consumer preference for more environmentally friendly products. In this work, a renewable vegetable oil-based polyol derived from jatropha oil was polymerized with isophorone diisocyanate and dimethylol propionic acid to produce anionic waterborne polyurethane dispersion. Free standing films with up to 62 wt.% bio-based content were successfully produced after evaporation of water from the jatropha oil-based waterborne polyurethane (JPU) dispersion, which indicated good film formation. The chemical and thermo-mechanical properties of the JPU films were characterized. By increasing the OH numbers of polyol from 161 mgKOH/g to 217 mgKOH/g, the crosslinking density of the JPU was significantly increased, which lead to a better storage modulus and improved hydrophobicity. Overall, JPU produced from polyol having OH number of 217 mgKOH/g appears to be a promising product for application as a binder for wood and decorative coatings.

Recent developments in waterborne polyurethane dispersions (WPUDs): a mini-review on thermal and mechanical properties improvement

2021 ◽  
Author(s):  
Swapnil M. Vaidya ◽  
Simran M. Jadhav ◽  
Mitesh J. Patil ◽  
Siddhesh U. Mestry ◽  
Umesh R. Mahajan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Waterborne Polyurethane ◽  
Thermal And Mechanical Properties ◽  
Recent Developments ◽  
Polyurethane Dispersions

Anionic waterborne polyurethane dispersion from a bio-based ionic segment

RSC Advances ◽  
2014 ◽  
Vol 4 (67) ◽  
pp. 35476-35483 ◽  
Author(s):  
Ruqi Chen ◽  
Chaoqun Zhang ◽  
Michael R. Kessler
Keyword(s):  
Hydrochloric Acid ◽  
Ring Opening ◽  
Linseed Oil ◽  
Waterborne Polyurethane ◽  
Polyurethane Dispersion ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Polyurethane Dispersions ◽  
Epoxidized Linseed Oil

Anionic waterborne polyurethane dispersions were prepared from ring-opening epoxidized linseed oil with glycol and hydrochloric acid followed by saponification, step-growth polymerization, and ionomerization.

Waterborne polyurethane dispersions synthesized from jatropha oil

2015 ◽  
Vol 64 ◽  
pp. 194-200 ◽  
Author(s):  
Sariah Saalah ◽  
Luqman Chuah Abdullah ◽  
Min Min Aung ◽  
Mek Zah Salleh ◽  
Dayang Radiah Awang Biak ◽  
...  
Keyword(s):  
Waterborne Polyurethane ◽  
Jatropha Oil ◽  
Polyurethane Dispersions

scholarly journals Effect of DMPA Content on Colloidal Stability of Jatropha Oil-based waterborne Polyurethane Dispersion

2020 ◽  
Vol 778 ◽  
pp. 012107 ◽  
Author(s):  
N S Nurdin ◽  
S Saalah ◽  
A T Lim ◽  
A Y Francis ◽  
L Abdullah ◽  
...  
Keyword(s):  
Colloidal Stability ◽  
Waterborne Polyurethane ◽  
Jatropha Oil ◽  
Polyurethane Dispersion

Investigation of Hyperbranced Polyesters with Different Generation and their Application in Waterborne Polyurethanes

2012 ◽  
Vol 152-154 ◽  
pp. 91-96 ◽  
Author(s):  
Dong Ya Yang ◽  
Li Han ◽  
Han Qing Zhang ◽  
Feng Xian Qiu
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Crosslinking Agent ◽  
Waterborne Polyurethane ◽  
Hyperbranched Polyester ◽  
Aqueous Dispersions ◽  
Hyperbranched Polyesters ◽  
Waterborne Polyurethanes ◽  
Lower Viscosity ◽  
Polyurethane Dispersions

The 1st, 2nd and 3rd generations of hydroxyl-terminated hyperbranched polyesters (HBPE-1, HBPE-2, and HBPE-3) were synthesized. A3rd generation hyperbranched polyester (HBPE-3) was used as original crosslinking agent to prepared hyperbranched waterborne polyurethane dispersions (HPU). FTIR spectra confirmed that this reaction really took place. The experimental data indicated that, compared with the linear one, the hyperbranched HPU aqueous dispersions exhibited lower viscosity, and larger particle size. For the hyperbranched HPU films, mechanical properties were obviously enhanced.

Ultrastrong, Free-Standing and Large Nanofilms of Pyrenearamid

2019 ◽  
Author(s):  
Amalia Rapakousiou ◽  
Alejandro López-moreno ◽  
Belén Nieto-Ortega ◽  
M. Mar Bernal ◽  
Miguel A. Monclús ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Building Block ◽  
Aromatic Polyamide ◽  
Free Standing ◽  
Spatial Confinement ◽  
Polymeric Structure ◽  
Reduced Modulus ◽  
Organizational Arrangement ◽  
Polycyclic Aromatic ◽  
Nanoscale Building Block

We introduce poly(1,6-pyrene terephthalamide) polymer (PPyrTA) as an aromatic polyamide analogue of poly(p-phenylene terephthalamide) (PPTA), also known as Kevlar®. This work shows that the incorporation of polycyclic aromatic pyrene moieties improves drastically the mechanical properties of the polymeric structure, increasing elastic nanoindentation-determined modulus and hardness by factors of 1.9 and 4.3, respectively. Liquid deprotonated dispersions of PPyrTA nanofibers were used as nanoscale building block for producing large-surface, free-standing polymer macroscopic nanofilms. This 2D assembly leads to further significant improvements in reduced modulus and hardness (more than twice) compared to the starting polymer macroscale fibres, due to a better re-organizational arrangement of the PPyrTA nanofibers in the nanofilms, formed under 2D spatial confinement.

scholarly journals A reactive molecular dynamics study on the mechanical properties of a recently synthesized amorphous carbon monolayer converted into a nanotube/nanoscroll

2021 ◽  
Author(s):  
Marcelo Lopes Pereira Junior ◽  
Wiliam Ferreira da Cunha ◽  
Douglas Soares Galvão ◽  
Luiz Antonio Ribeiro Junior
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Chemical Vapor Deposition ◽  
Amorphous Carbon ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Free Standing ◽  
Reactive Molecular Dynamics

Recently, laser-assisted chemical vapor deposition has been used to synthesize a free-standing, continuous, and stable monolayer amorphous carbon (MAC).

scholarly journals Mechanical strength and flexibility in $$\alpha '$$-4H borophene

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shobair Mohammadi Mozvashi ◽  
Mohammad Ali Mohebpour ◽  
Sahar Izadi Vishkayi ◽  
Meysam Bagheri Tagani
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
2D Materials ◽  
Group Iv ◽  
Good Stability ◽  
Free Standing ◽  
Promising Candidate ◽  
Inherent Anisotropy

AbstractVery recently, a novel phase of hydrogenated borophene, namely $$\alpha '$$ α ′ -4H, has been synthesized in a free-standing form. Unlike pure borophenes, this phase shows very good stability in the air environment and possesses semiconducting characteristics. Because of the interesting stiffness and flexibility of borophenes, herein, we systematically studied the mechanical properties of this novel hydrogenated phase. Our results show that the monolayer is stiffer (Y$$_\text {xy}$$ xy = $$\sim $$ ∼ 195 N/m) than group IV and V 2D materials and even than MoS$$_2$$ 2 , while it is softer than graphene. Moreover, similar to other phases of borophene, the inherent anisotropy of the pure monolayer increases with hydrogenation. The monolayer can bear biaxial, armchair, and zigzag strains up to 16, 10, and 14% with ideal strengths of approximately 14, 9, and 12 N/m, respectively. More interestingly, it can remain semiconductor under this range of tension. These outstanding results suggest that the $$\alpha '$$ α ′ -4H is a promising candidate for flexible nanoelectronics.

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