Compatibilization by main‐chain thermotropic liquid crystalline ionomer of blends of PBT/PP

Abstract

ABSTRACT:The miscibility and mechanical properties of the blends of polybutylene terephthalate (PBT) and polypropylene (PP) with a liquid crystalline ionomer (LCI) containing a sulfonate group on the terminal unit as a compatibilizer were assessed. SEM and optical microscopy (POM) were used to examine the morphology of blends of PBT/PP compatibilized by LCI. DSC and TGA were used to discuss the thermal properties of PBT/PP blends with LCI and without LCI. The experimental results revealed that the LCI component affect, to a great extent, the miscibility and crystallization process and mechanical property of PBT/PP blends. The fact is that increasing LCI did improve miscibility of PBT/PP blends and the addition of 1% LCI to the PBT/PP blends increased the ultimate tensile strength and the ultimate elongation.

Synthesis and mesomorphic properties of side‐chain liquid crystalline ionomers containing sulfonic acid groups

“…The ionic groups were incorporated either into the main-chain or the side-chain to improve the physical properties of polymers, 1,2 ionic interactions between molecules can improve compatibility between different polymers in polymer blends [3][4][5][6][7][8] and the ordering of mesogenic fragments can enhance mechanical properties, 9 such a system could combine the characteristic features of both LCPs and ionomers, leading to new and useful materials. 10 In fact, incorporation of small concentration of ions into polymers has greatly influenced the properties of the polymers, not only does the ionic interactions modify structure and properties of LCIs, but also results in the physical crosslink.…”

Compatibilization of PP/PAE blends by means of the addition of an ionomer

“…Maleic anhydride‐grafted PP (PP‐ g ‐MA) has been used in mixtures of PP with polyamides [22–25], epoxy [26–28], EVOH [7, 15, 29], and organoclays [21, 30–33], among others. In the last decade, ionomers have been successfully used to compatibilize immiscible polymer blends [12, 13, 34–47] as well as to improve the dispersion of the organically modified montmorillonite clay in polyesters [48, 49]. In the case of PP‐based blends, different kinds of ionomers have been used to compatibilize them.…”

Preparation and characterization of poly(butylene terephthalate)/silica nanocomposites

“…However, the disadvantages such as low impact strength and heat distortion temperature limit the applications of PBT. Many attempts have been made to obtain desirable properties of PBT by blending it with other polymers or fillers [7][8][9][10][11][12][13][14][15][16][17][18][19]. Among these blends, PBT/inorganic nanocomposites have attracted more and more interest, especially PBT/clay nanocomposites have been widely investigated.…”