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.