Flexural strength of MDF cements

Biaxial Flexural Strength of MDF Cements with Diglycidyl Ethers of Bisphenol A and F. 

Figure 1 Biaxial flexural strengths of MDF cements produced with diglycidyl ethers of bisphenol A...

A correlation between the surface morphology and biaxial flexural strength of MDF cements has been established. 

Recently, it has been found that the use of alumina cement and autoclave cure after moist and heat cure are most effective for improving the water resistance of MDF cements.P Figure 8.6 shows the flexural strength of heat plus autoclave cured MDF cements using the alumina cement before and after 48-hour water immersion. 

As MDF cements generally have very high flexural strength, it is expected that ideal composite materials can be made by reinforcing them with fibers. An example of the development of high flexural strength by the fiber reinforcement of MDF cements is demonstrated in Table 8.1. ... 

Figure 8.6 Moist curing period vs. flexural strength of heat plus autoclave cured MDF cements using alumina cement before and after 48-hour water immersion.

Different cement and polymer types [2, 7-9] can be used for the production of MDF cement. However, highest flexural strengths are always obtained when calcium alumina cements (CAC) as a... 

Promising flexural strengths were obtained when MDF cements were produced with the addition of small amount of diglycidiyl ether of bisphenol A. The strength drop was only 19% after 28-d water storage of MDF cements with 1% epoxy resin addition. 

Efforts have also been made to produce MDF-like materials in which the role of the organic polymer is taken over by an inorganic polymer, specifically sodium polyphosphate (Ma and Brown, 1992). In this way flexural strengths of up to about 30 MPa were achieved in combination with calcium aluminate cement. The resulting phosphate-containing reaction products were found to be amorphous. 

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