3.2 Materials
65
(a)
(b)
(c)
(d)
(e)
Fig. 3.1 SEM images of the cross sections: a PCM nonwoven, b PCM foam, c PCM fabric, d PCM
composite and e PWAT fabric
3.3 Motorcycle Helmets
The visor-open and visor-closed motorcycle helmets used in the current study were
collected from the Tong Ho Hsing (THH) Helmet Company and are shown in
Fig. 3.2a, b respectively. The visor-open helmet was only used for initial trials and