Compatibilization of side‐chain, thermotropic, liquid‐crystalline ionomers to blends of polyamide‐1010 and polypropylene

Abstract

A novel side-chain, liquid-crystalline ionomer (SLCI) with a poly(methyl hydrosiloxane) main chain and side chains containing sulfonic acid groups was used in blends of polyamide-1010 (PA1010) and polypropylene (PP) as a compatibilizer. The morphological structure, thermal behavior, and liquid-crystalline properties of the blends were investigated by Fourier transform infrared, differential scanning calorimetry, thermogravimetric analysis, and scanning electron microscopy. The morphological structure of the interface of the blends containing SLCI was improved with respect to the blend without SLCI. The compatibilization effect of greater than 8 wt % SLCI for the two phases, PA1010 and PP, was better than the effects of other SLCI contents in the blends.

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.…”

“…Thus, ionomers of poly(ethylene‐ co ‐methacrylic acid) (PEMA) have been used in PP‐based nanocomposites [34] and in blends of PP with liquid‐crystalline polymers (LCPS) [36] and EVOH [12, 13, 39, 40]. Ionomers of poly(ethylene‐ co ‐acrylic acid) have been used in PP/LCP blends [35], ionomers of poly(ethylene‐methacrylic acid‐isobutylacrylate) in PP/PA6 blends [37, 38], and liquid‐crystalline ionomers in blends of PP with both PA and PBT [41–43].…”

Calix[6]pyrrole and Hybrid Calix[n]furan[m]pyrroles (n+m=6): Syntheses and Host–Guest Chemistry

“…The tensile strength is about 53 MPa for iPP sheared for 6 min (not shown here). The immiscibility between PA1010 and iPP should be responsible for that 1–3. As for the impact strength demonstrated in Fig.…”

“…However, this is at the cost of mechanical properties, unless some forms of compatibilization are applied. So, much effort has been devoted to compatibilizing the blend system with third components, generally some graft copolymers 2–5. In addition, the morphology in the blend has attracted the attention of many researchers because morphological control has great influence on the properties of blend materials 1, 3, 6…”

New side‐chain liquid‐crystalline ionomers. I. Synthesis and characterization of a homopolymer derived from ionic mesogenic groups

“…Both main-chain [1][2][3][4][5] and sidechain 6 -12 LCIs have recently attracted considerable interest from those wishing to obtain new materials with desirable properties, such as mechanical, electrooptic, and magnetic properties. The reasons for having ionic units in these polymers are as follows: (1) ionic interactions can promote interchain interactions and improve the transverse mechanical properties for engineering materials, (2) ionic interactions similar to physical crosslinking effects can restrict the phaseseparation process and result in microphases for the immiscible components as compatibilizers in polymer blend materials, [13][14][15][16][17] and (3) ionic units may possess electric conductivity and magnetic activity and find applications in the fields of nanotechnology and magnetic data recording. 18,19 Moreover, LCIs also play important roles in understanding more complex biosystems.…”