scholarly journals Mechanical Properties of Some Epoxy-PMMA Blends

2021 ◽  
Vol 58 (2) ◽  
pp. 220-228
Author(s):  
Georgel Mihu ◽  
Sebastian-Marian Draghici ◽  
Vasile Bria ◽  
Adrian Circiumaru ◽  
Iulian-Gabriel Birsan
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Thermoplastic Polymer ◽  
Special Equipment ◽  
Effect Of Solvents ◽  
Thermoplastic Blends ◽  
Thermoset Polymer ◽  
Temperature And Pressure ◽  
Pmma Blends

The thermoset polymers and the thermoplastic polymers matrix composites require different forming techniques due to the different properties of two classes of polymers. While the forming technique for thermoset polymer matrix composites does not require the use of special equipment, the thermoplastic polymer matrix composites imposes the rigorous control of temperature and pressure values. Each type of polymer transfers to the composite a set of properties that may be required for a certain application. It is difficult to design a composite with commonly brittle thermoset polymer matrix showing properties of a viscoelastic thermoplastic polymer matrix composite. One solution may consist in mixing a thermoset and a thermoplastic polymer getting a polymer blend that can be used as matrix to form a composite. This study is about using PMMA solutions to obtain thermoset-thermoplastic blends and to mechanically characterize the obtained materials. Three well known organic solvents were used to obtain the PMMA solutions, based on a previous study concerning with the effect of solvents presence into the epoxy structure.

Integrated Defect Classification in Manufacturing of Carbon Fibre Reinforced Thermoplastic Polymer Matrix Composites

2016 ◽  
Vol 879 ◽  
pp. 554-559 ◽  
Author(s):  
Michael Fischlschweiger ◽  
Alexander Stock ◽  
Markus Thurmeier
Keyword(s):  
Quality Control ◽  
Carbon Fibre ◽  
Polymer Matrix ◽  
High Performance ◽  
Polymer Matrix Composites ◽  
Cost Effective ◽  
High Volume ◽  
Matrix Composites ◽  
Thermoplastic Polymer ◽  
Part Quality

Thermoplastic polymer matrix composites with continuous carbon fibre reinforcements are of crucial relevance in automotive industry. The mix of high performance and cost effective manufacturing makes them attractive for high volume production. However, it could be shown that production integrated end of line quality control is of strong importance to ensure continuous and traceable part quality. Besides, typical non destructive testing method specifications, higher production volumes additionally require short testing times. Herein, the application of active thermography as end of line quality control in composite production is evaluated and compared with results obtained by X-ray radiometry. It could be revealed that transient pulse phase thermography is a powerful tool to analyse part quality of continuous thermoplastic polymer matrix composites in short testing times.

Variable Frequency Microwave Processing of Thermoset Polymer Matrix Composites

1994 ◽  
Vol 347 ◽  
Author(s):  
Mark T. Demeuse ◽  
Arvid C. Johnson
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Power Level ◽  
Sample Surface ◽  
Microwave Processing ◽  
Single Frequency ◽  
Variable Frequency ◽  
Matrix Composites ◽  
Heating Effects ◽  
Thermoset Polymer

ABSTRACTThis paper reports on the use of variable frequency microwave processing to uniformly heat and post-cure large (>100 cm2) plates of thermoset polymer matrix composite (PMC) material consisting of isocyanate/epoxy mixtures. Prior work has indicated that microwave energy is capable of reducing the time or the temperature necessary to achieve full cure; however, single-frequency microwave heating results in non-uniformity of heating/curing in areas of over 12.5 cm2. By using a Variable Frequency Microwave Furnace and sweeping the microwave power over the 5 to 6 GHz frequency range at a power level of 150 Watts, uniform heating and curing of the PMC plates was achieved over an area of greater than 100 cm2-- and a volume of greater than 200 cm3. The overall temperature gradient across the surface of the plates was less than 10%. Finally, this paper also reports on observed, volume-related heating effects, which are postulated to be the result of heat loss from the sample surface.

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