Acrylic (polymethyl methacrylate, PMMA) does not filter out UV rays and can pass 73% of UV rays. Some acrylic board manufacturers coat the acrylic surfaces in order to increase the UV-filtering effect and property.
When exposed to UV rays, acrylic has better stability than PC. In fact, the nature of common acrylic is relatively stable. Under the outdoor exposure for several years, acrylic will not be affected by looking or function.