Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 30 (1995), S. 4323-4334 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract As the work of adhesion, W a, increases between a silica filler surface and a polymer matrix, the dynamic viscosity and the shear modulus of the composite material increase. The logarithms of these properties decrease linearly as W a decreases. At lower dynamic test frequencies, a change in W a has a more dramatic impact on these properties than at higher frequencies. An “effective silica particle size” model can be used to explain why W a affects the viscosity and the shear modulus of a composite. According to that model, the thickness of the interphase layer increases as the W a increases. An increase in effective particle size decreases the “free” polymer volume, and the decrease free volume polymer causes both the viscosity and the shear modulus to increase. Increasing the dynamic test frequency releases some of the immobilized polymer from the filler surface which causes the effective particle size to decrease. As the effective particle size decreases because of the increased testing frequency and approaches the mean size of the original filler, the impact of the W a value on viscosity and shear modulus should decrease. However, the friction experienced between the filler interphase and the polymer, the so called “skin friction”, depends on the magnitude of W a and the more general term, bond energy density (BED). The skin friction determines the viscosity of the composite, particularly at lower frequencies. Higher W a values induce higher skin friction and thereby higher flow resistance (viscosity) as polymer chains move along the filler surface.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...