In situ composites formed by injection molding

5 ELASTIC MODULI OF GLASS FIBER-REINFORCED POLYMER LIQUID CRYSTALS [Pg.480]

We have seen that composites containing PLC fibrils as reinforcing elements can be readily produced. A more common application of PLC is to serve as the matrix material of short fiber-reinforced composites. Since the current cost of PLC is rather high, the addition of glass fibers results in not only an increase in stiffness but also a reduction in cost. Because of the growing importance of short fiber-reinforced PLC it is [Pg.480]

The stiffness constants and Young s moduli of 30 wt% glass fiber-reinforced Vectra A are given in Tables 14.9 and 14.10, respectively. The elastic moduli of 30 wt% glass fiber-reinforced polyphenylene sulfide (PPS), taken from reference 41, are also shown for comparison. PPS is isotropic and has a Young s modulus and shear modulus of 4.0 [Pg.482]

6 ELASTIC MODULI AND ACOUSTIC ABSORPTION OF COMB POLYMER LIQUID CRYSTALS [Pg.483]

Unlike main chain PLCs, the mesogenic units in side chain PLCs are located not in the polymer backbone but in the side chains. The dynamics of a side chain PLC is therefore determined by the behavior of both the backbone and the mesogenic groups as well as the coupling between them. Neutron scattering studies [43,44] reveal that the polymer [Pg.483]

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