This difference in relaxation behavior
between the two reactive systems confirmed the difference in copolymer architectures considered previously.
Despite the time-dependent relaxation behavior
of the thermoplastic, only a very small reduction in the value of the internal stress can be expected after seven days.
Within the framework of this article, it was possible to demonstrate that important information on network structure and the polymer-filler interactions can be derived from the thermoelastic properties and the relaxation behavior
of S-SBR-silica vulcanizates.
This experiment studied the relaxation behavior
of coating surface indentation with changing environmental RH and temperature.
of the amorphous components of wood.
Figure 4b shows the effect of the spatial distribution of silica particles on the relaxation behavior
of the blend.
and its effects upon degradation is an important aspect that needs to be included when correlating accelerated weathering with natural weathering.
After 300 hours of testing, non-aerated or aerated HNBR had the same stress relaxation behavior
, whereas aeration in silicone had an important effect in reducing sealing force in the same time frame.
The effect of E-beam dose on stress relaxation behavior
was studied at controlled temperature, 30[degrees]C, as shown in Fig.
Stress relaxation behavior
was studied to see the changes under varying circumstances.
The proposed test geometry appears to offer a rapid screening test for better understanding of the compressive stress relaxation behavior
of various materials when subjected to virtually any desired service conditions (aging time, fluid and temperature).
To compare the relaxation behavior
of the LLDPE/LDPE blends as well as to obtain further information on their miscibility, the weighted relaxation spectra were determined by the use of dynamic modulus results (G', G", [omega]) and the following equations :
The stress relaxation behavior
of a polymer contains information on its MWD which as mentioned above lead to attempts to derive MWDs from stress relaxation tests on linear polymers (refs.
A polymer with a very narrow MWD is expected to display a relaxation behavior
similar to a single Maxwell element while a polymer with a wider MWD has fast and slow relaxation modes which may be approximated by the generalized Maxwell model.
According to Winter and Chambon (58), (59), the simple relaxation behavior
of the critical gels is followed by a power law relaxation modulus, where S (gel strength) and n (relaxation exponent) are the characteristics of the critical gel while [lambda] denotes the relaxation time: