Assessment of Polyanilines as Alternative Anti-Corrosion Materials: A Theoretical Analysis of Metal-Polymer Adhesion.

1995 ◽  
Vol 413 ◽  
Author(s):  
Robert Vallerio ◽  
Roy Keyer ◽  
Steve Grabania ◽  
Mary Landis ◽  
Susan Jansen ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Polymer Blends ◽  
Metal Surfaces ◽  
Polymeric Materials ◽  
Hazardous Materials ◽  
Control Methods ◽  
Corrosion Control ◽  
Polymer Adhesion ◽  
Environmentally Safe ◽  
Metal Polymer

Current corrosion control methods use coatings which are toxic and environmentally hazardous materials, such as, chromium. More work needs to be done to find a substitute that is competitive with current industrial technologies. Many polymeric materials have been tested as possible alternatives to the present systems. These include polysiloxanes, polymer blends based on polymethylmethacrylate/polysiloxanes and co-polymers of these materials. [1] Oxidized and carbided metal surfaces have been analyzed as chromium substitutes as well. [2] So far the technology has not advanced to a industrially competitive level. Polyaniline is on of the most promising materials for environmentally safe corrosion control.

scholarly journals In Situ Generation of Green Hybrid Nanofibrillar Polymer-Polymer Composites—A Novel Approach to the Triple Shape Memory Polymer Formation

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1900
Author(s):  
Ramin Hosseinnezhad ◽  
Iurii Vozniak ◽  
Fahmi Zaïri
Keyword(s):  
Polymer Blends ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Cellulose Nanofibers ◽  
Polymeric Materials ◽  
Novel Approach ◽  
Phase Transition Temperatures ◽  
Triple Shape Memory

The paper discusses the possibility of using in situ generated hybrid polymer-polymer nanocomposites as polymeric materials with triple shape memory, which, unlike conventional polymer blends with triple shape memory, are characterized by fully separated phase transition temperatures and strongest bonding between the polymer blends phase interfaces which are critical to the shape fixing and recovery. This was demonstrated using the three-component system polylactide/polybutylene adipateterephthalate/cellulose nanofibers (PLA/PBAT/CNFs). The role of in situ generated PBAT nanofibers and CNFs in the formation of efficient physical crosslinks at PLA-PBAT, PLA-CNF and PBAT-CNF interfaces and the effect of CNFs on the PBAT fibrillation and crystallization processes were elucidated. The in situ generated composites showed drastically higher values of strain recovery ratios, strain fixity ratios, faster recovery rate and better mechanical properties compared to the blend.

scholarly journals Mechanical and Morphological Properties of Bio-Phenolic/Epoxy Polymer Blends

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 773
Author(s):  
Ahmad Safwan Ismail ◽  
Mohammad Jawaid ◽  
Norul Hisham Hamid ◽  
Ridwan Yahaya ◽  
Azman Hassan
Keyword(s):  
Mechanical Properties ◽  
Phase Separation ◽  
Polymer Blends ◽  
Epoxy Polymer ◽  
Flexural Modulus ◽  
Polymeric Materials ◽  
Morphological Properties ◽  
Comparison Results ◽  
Unique Material ◽  
Different Types

Polymer blends is a well-established and suitable method to produced new polymeric materials as compared to synthesis of a new polymer. The combination of two different types of polymers will produce a new and unique material, which has the attribute of both polymers. The aim of this work is to analyze mechanical and morphological properties of bio-phenolic/epoxy polymer blends to find the best formulation for future study. Bio-phenolic/epoxy polymer blends were fabricated using the hand lay-up method at different loading of bio-phenolic (5 wt%, 10 wt%, 15 wt%, 20 wt%, and 25 wt%) in the epoxy matrix whereas neat bio-phenolic and epoxy samples were also fabricated for comparison. Results indicated that mechanical properties were improved for bio-phenolic/epoxy polymer blends compared to neat epoxy and phenolic. In addition, there is no sign of phase separation in polymer blends. The highest tensile, flexural, and impact strength was shown by P-20(biophenolic-20 wt% and Epoxy-80 wt%) whereas P-25 (biophenolic-25 wt% and Epoxy-75 wt%) has the highest tensile and flexural modulus. Based on the finding, it is concluded that P-20 shows better overall mechanical properties among the polymer blends. Based on this finding, the bio-phenolic/epoxy blend with 20 wt% will be used for further study on flax-reinforced bio-phenolic/epoxy polymer blends.

INFLUENCE OF THE DYNAMICS OF FORCED MOTION ON THE STATIC FRICTION IN METAL-POLYMER SLIDING PAIRS

Tribologia ◽  
2021 ◽  
Vol 295 (1) ◽  
pp. 21-26
Author(s):  
Mariusz Opałka ◽  
Wojciech Wieleba ◽  
Angelika Radzińska
Keyword(s):  
Relative Motion ◽  
Friction Pair ◽  
Polymeric Materials ◽  
Static Friction ◽  
Metallic Materials ◽  
Test Results ◽  
Friction Resistance ◽  
Rate Of Increase ◽  
Polymer Metal ◽  
Metal Polymer

The resistance during the frictional interaction of polymeric materials with metallic materials is characterized by a significant dependence on the dynamics of the motion inputs. In a metal-polymer friction pair, the static friction resistance during standstill under load depends on the rate of growth of the force causing the relative motion. Tribological tests of selected (polymer-metal) sliding pairs were carried out. The selected polymers were polyurethane (TPU), polysulfone (PSU), and silicone rubber (SI). They interacted with a pin made of normalized C45 steel under unitary pressure p = 0.5 MPa in dry friction conditions at different gradients of the force driving the relative motion (dF/dt = 0.1-20 [N/s]). The static friction coefficient of the selected sliding pairs was determined on the basis of the recorded static friction force values. The test results show a significant influence of the rate of increase in the motion driving force on the values of static friction resistance. This is mainly due to the viscoelastic properties of polymers.

Modelling the Impact Strength of Polymeric Materials

2017 ◽  
Vol 44 (10) ◽  
pp. 27-32 ◽  
Author(s):  
G.A. Lushcheikin
Keyword(s):  
Elastic Modulus ◽  
Impact Strength ◽  
Theoretical Analysis ◽  
Polymeric Materials ◽  
Double Support ◽  
Reinforcing Fillers ◽  
Impact Bending ◽  
The Impact

A theoretical analysis of the process of determining the impact strength under double-support impact bending (the Charpy notched impact strength), aN, is carried out, on the basis of which analytical dependences of aN on the elastic modulus, the parameters of the relaxation mobility of the polymer, the temperature, and the content of reinforcing fillers are proposed. The results of experiments confirm the correctness of the proposed methods for calculating aN.

Sign in / Sign up

Export Citation Format

Share Document