Photosensitized Degradation of PLA

The wavelength region of photoabsorption for a polymeric material is determined by its chemical structure. If there is a desire to enhance or to control the wavelength region in order to change the photosensitivity, one of the approaches is to alter the chemical structure of the polymer. However, if an 

FIGURE 24.9 (a and b) Mechanism A and B of photodegradation of PLLA under UV irradiation according to Janorkar et al. [15]. 

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