*5.4.2.2 Raman imaging and Spectrum of multiple washed sample at 40°C*

In **Figures 19** and **20** the scanning position of images A illustrates the PCM microcapsules in the web and therefore the depth profiling of the Raman in images B only show 2 different wavelengths which are recognised as the n-octadecane paraffin and the acrylic resin in the spectrum represented by colours: blue and red.

**Figure 21** represents the Raman spectrum of the washed sample at 30°C and **Figure 22** represents the Raman spectrum of the washed sample at 40°C. In both these spectrums it can be observed that there is a change in band positioning, the width and shape of the peaks have transformed, which can indicate polymer changes in the crystalline phase, as indicated in the DSC analysis. The change in band shift is

#### **Figure 20.**

*Raman scan position of washed sample at 40°C (left: Image a); Raman scan depth of washed sample at 40°C (right: Image B).*

*The Effect of Laundering on the Physical and Thermal Properties of Phase Change Textile… DOI: http://dx.doi.org/10.5772/intechopen.105064*

**Figure 21.** *Raman spectrum of washed sample at 30°C.*

**Figure 22.**

*Raman spectrum of washed sample at 40°C.*

also owing to the temperature and stress applied from to the laundering effect, the more orientated the washed sample, the more shift is seen.
