EFFECTS OF CHEMICAL MODIFICATION OF LIQUID-CRYSTALLINE POLYMER ON THERHEOLOGICAL, MORPHOLOGICAL, AND MECHANICAL-PROPERTIES OF NYLON-6 LIQUID-CRYSTALLINE POLYMER BLENDS
Sh. Kim et al., EFFECTS OF CHEMICAL MODIFICATION OF LIQUID-CRYSTALLINE POLYMER ON THERHEOLOGICAL, MORPHOLOGICAL, AND MECHANICAL-PROPERTIES OF NYLON-6 LIQUID-CRYSTALLINE POLYMER BLENDS, Polymer Journal, 27(7), 1995, pp. 693-702
A liquid crystalline polymer (LCP) is chemically modified with maleic
anhydride, and then its effects on the rheological, morphological, and
mechanical properties of nylon 6/LCP blends are investigated. The com
plex and shear viscosities of nylon 6/modified LCP blends are higher t
han those of nylon 6/unmodified LCP blends over the entire frequency a
nd shear rate range examined. In the plots of log G' versus log G '',
the modified LCP blends show more elastic properties as compared with
the unmodified blends. The morphology of fracture surface shows that t
he domain size and its distribution of the modified LCP blends are fin
er and more uniform than those for the unmodified ones. The mechanical
properties of the modified LCP blends are better than those of the un
modified LCP ones. These results are attributed to the formation of in
situ graft copolymer resulting from the reaction between maleic anhyd
ride grafted onto LCP and the terminal amine group of nylon 6.