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Table 1 Mean value of surface roughness parameters (Ra) and root-mean-square (RMS) height of the samples

From: Preparation and ageing-resistant properties of polyester composites modified with functional nanoscale additives

Samples Ra/nm RMS height/nm
Polyester without nano-TiO2 0-h ageing 10.147 190.67
1500-h ageing 145.22 2105.00
Polyester/2.0 wt% nano-TiO2 composite 0-h ageing 11.305 165.72
1500-h ageing 49.534 523.00
  1. Before and after 1500-h UV ageing.