1：Experimental Design and Method Selection:

The study involved preparing polymeric composites via extrusion and injection moulding using ABS and PMMA matrices with silver nanoparticles as a modifier. The methodology included mechanical testing, surface property evaluation, and stability assessment over time.

2：Sample Selection and Data Sources:

Samples were prepared from commercially available ABS (NovodurHDM203FC and NovodurHDM205FC) and PMMA (SG7 and SG10) polymers with silver nanoparticles (0.5% and 1% by weight). Data were collected before and after 6 and 12 months of incubation in deionized water at 37 ± 1 °C.

3：5% and 1% by weight). Data were collected before and after 6 and 12 months of incubation in deionized water at 37 ± 1 °C. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included a contact profilometer (HOMMEL-ETAMIC T1000 wave), drop shape analysis system (DSA 10 Mk2), scanning electron microscope (Nova Nano SEM FEG-200), universal testing machine (Inspect Table Blue 5 kN), and ultrasonic apparatus (MT541 device). Materials included silver nanoparticles from NanoAmor, deionized water, and polymer granules.

4：Experimental Procedures and Operational Workflow:

Granulate was dried, silver nanoparticles were homogenized with polymer granules using a screw, melted twice, injected into a mould, cooled, and extracted. Samples were incubated in deionized water, and measurements (roughness, contact angle, SEM, tensile strength, Young's modulus, ultrasound velocity) were performed at specified intervals.

5：Data Analysis Methods:

Data were analyzed using statistical techniques, with parameters averaged from multiple measurements and expressed as mean ± standard deviation.