SCLCPSide-Chain Liquid-Crystalline Polymer
References in periodicals archive ?
Here, the main idea of arc search feasible interior-point algorithm for monotone SCLCP is described.
Using EJA, Faybusovich [4] generalized IPMs over non-negative orthant problems to symmetric optimization (SO) problems and SCLCPs. Gowda and Sznajder [5] showed some global uniqueness and solvability result for SCLCPs.
This paper proposed an arc search feasible interior-point algorithm for monotone SCLCPs. The algorithm follows an ellipsoidal approximation of the central path and generates a sequence of iterates in a wide neighborhood of the central path.
Figures 5-7 show the [Chi][double prime]([Omega]) behavior of the SCLCP samples 1-3 respectively over a frequency range of [10.sup.-4] to [10.sup.5] Hz and a temperature range of 25 [degrees] C (5 [degrees] C) 45 [degrees] C (40 [degrees] C for SCLCP 2), all plotted on a log-log scale.
It is suggested that the observed loss peak for the three SCLCP samples are due to the phase transition phenomena.
5-7 that the SCLCP 3 shows the highest value of [[Chi][double prime].sub.max] among the three samples.
A significant release of space charges is particularly noticed for SCLCP 1 [ILLUSTRATION FOR FIGURE 8 OMITTED].
It can be observed from Table 5 that the SCLCP 1 has the highest pyroelectric coefficient of 3.4 x [10.sup.-7] C/[m.sup.2]K at 25 [degrees] C.
Now the dipoles in the SCLCP 1 backbone are interacting and conjugated through the [Pi]-electrons.
For a side chain liquid crystal polymer (SCLCPs) to have potential use in electro-optical devices, low viscosities at room-temperature are necessary.
In this study we have investigated, in a systematic manner, the effects of small variations in the polymer backbone; on the mesophase structure and on the transition temperatures and [T.sub.g]s for a series of SCLCPs based on poly(ethylene terephthalates), which are shown in Fig.
Thin discs of SCLCPs were prepared by heating the materials at their softening temperature in a specially constructed ceramic cell containing spring loaded electrical contacts.