Water is an essential comonomer in a supramolecular polymer that is used as a recyclable, water-activated glue.

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The influences of the glass fiber content and initial length on the mechanical properties of long glass fiber reinforced nylon 66 (LGF-PA66) were investigated, and then the appropriate glass fiber content (30%) and initial glass fiber length (10 mm) were determined to study the effect of three kinds of compatibilizers (maleic anhydride grafted polypropylene (PP-g-MAH), maleic anhydride grafted polyolefin elastomer (POE-g-MAH) and maleic anhydride grafted ethylene propylene diene monomer (EPDM-g-MAH)) on the mechanical properties of the LGF-PA66 composites. It is found that a maximum tensile strength is reached for the composites when any of the different compatibilizers are 2.5 wt%. However, the influence of PP-g-MAH on the impact strength of composites is different from the others. Tensile strength and notched impact strength models were applied to interpret the experimental results of the mechanical properties.

Nanocomposites based on poly(l‐lactide) (PLA) and organically modified Ni/Al layered double hydroxides (NiAl/LDHs) are prepared by melt blending and investigated by a combination of size exclusion chromatography, differential scanning calorimetry (DSC), small‐angle X‐ray scattering (SAXS), wide‐angle X‐ray scattering, and broadband dielectric spectroscopy. A detailed comparison to the behavior of the corresponding MgAl/LDH–PLA nanocomposites is made. SAXS investigations show that the morphology of the NiAl/LDH–PLA nanocomposites is more intercalated compared to the MgAl/LDH based PLA nanocomposite, which is more exfoliated. The DSC investigation gives a different dependence of the degree of crystallization on the concentration of LDH for NiAl/LDH–PLA than for MgAl/LDH–PLA nanocomposite system. These differences are discussed taking the differences of the morphologies of both systems into account. Broadband dielectric spectroscopy reveals information about the molecular dynamics where essential differences are observed for all relaxation processes taking place in both systems which were related to the different morphologies.

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