Artificial weathering effect on the structure and properties of polypropylene/polyamide‐6 blends compatibilized with PP‐g‐MA

Abstract

The degradation of uncompatibilized and compatibilized PP/PA‐6 (70/30 wt %) with PP‐g‐MA under accelerated UV light was investigated using Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy, melt flow index (MFI) tester, tensile test, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). FTIR analysis of the structure of the compatibilized and uncompatibilized blends after exposure to UV light showed the formation of photoproducts corresponding to both components. The MFI and mechanical results obtained revealed that photooxidation started primarily in PA‐6 rather than PP. In addition, the uncompatibilized blends exhibited a higher degradation rate compared to neat polymers for long exposure time, and the addition of PP‐g‐MA increased slightly their ageing rate in accordance with TGA data. Further, DSC analysis showed an increase in the crystallinity index and a decrease in the melting temperature of PP and PA‐6 after UV exposure either as neat polymers or as blend components. SEM micrographs of the cryo‐fractured surfaces of the samples illustrated the formation of cracks and fractures after UV irradiation. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41722.

Nano-Charged Polypropylene Application: Realistic Perspectives for Enhancing Durability

“…In fact, in Ref. [ 54 ] the authors performed TGA analysis of polypropylene in air atmosphere, and they found that the TGA traces shifted to lower temperatures with increasing weathering time, and a similar trend was also found in literature for TGA analysis, performed under Nitrogen atmosphere, on commercial polypropylenes before and after 250 h [ 55 ] or 300 h [ 56 ] of exposure to the UV irradiation.…”

Poly(decamethylene terephthalamide) copolymerized with long‐chain alkyl dodecanedioic acid: Toward bio‐based polymer and improved performances

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“…It is noteworthy that PA10T/ 1012 still exhibit more outstanding thermal stability than the familiar aliphatic polyamides, such as PA6 (T d,5% 5 405 8C) and PA66 (T d,5% 5 402 8C). 46,47 The usual processing methods of PA10T/1012, for example, extrusion and injection, are carried out above its melting point. Therefore, we define the difference between T d,5% and T m as melt processing window of materials as shown in Table III.…”

Photodegradation of polybenzimidazole/polyvinyl chloride composites and polybenzimidazole: Density functional theory and experimental study

“…Due to the penetration effect of UV irritation, the interior under the irradiated surface of PVC composites would be damaged 19,20 . As shown in Figure 2, some gaps and cracks are observed on the cross‐sectional surface of PVC composites after 1,200 h UV‐weathering.…”