The weathering characteristics of ECOLYTE polystyrene: Part 1—A photo-degradable copolymer masterbatch and blends with polystyrene

Testing Methods of Weathered Specimen

“…Usually, the changes in tensile strength are quite sensitive to the changes in the molecular weight of the polymer (Figure 13.49). 434,441 Tensile strength can be determined with high precision, as shown by Suzuki 425 (Table 13.3). 434,441 In some cases, an initial increase of tensile strength is followed by quite rapid deterioration.…”

“…Tensile strength may either increase or decrease during weathering. 434,441 In some cases, an initial increase of tensile strength is followed by quite rapid deterioration. In most cases, tensile strength decreases during exposure.…”

Data on Specific Polymers

“…An introduction of carbonyl groups into a polystyrene backbone chain results in an increased degradation rate (Figure 14.129). 785 This method is used to promote PS degradation in a photodegradable materials (Ecolyte copolymer).…”