Effect of accelerated weathering on the creep behaviour of additively manufactured Polyethylene Terephthalate Glycol (PETG)

Abstract

As additively manufactured components move away from short-term usabilit y , su ch as sin gle-u se p ro to typ es, t o wards commercial products used for longer periods of time, the long-term material properties, such as ageing and creep, are becoming increasingly important design considerations. Moreover, when additively manufactured components are designed for outdoor use, environmental stressors affect these long-term material properties in a process known as 'wea therin g'. I n th is research paper, an initial set of experiments assessed the flexural creep behaviour of pellet-printed PETG a fter ex po su re t o three accelerated environmental stressors: UV radiation, temperature and humidity. The outcomes thereof ind icat ed t hat UV exposure was the only stressor to increase the creep compliance. A subsequent set of experiments increase t h e UV ex p o sure duration from 100hr to 200hr and excluded the effects of ageing on creep behaviour during creep tests. Th e o utcome o f th is second series of experiments showed that the increase in creep compliance can be attributed to the effects of UV alone.

A review of the selection process and decontamination methods with the use of face shields in UV phototherapy during the SARS‐CoV‐2 pandemic

“…Facial shields manufactured from PETG are robust and durable with a lengthier shelf‐life owing to their ability to withstand a multitude of environmental stresses including repeated decontamination processes. However the UV wavelength protection offered by PETG (less than 340 nm) is considerably lower than that offered by other materials available 9 (Table 1).…”

Farklı üretim parametreleri kullanılarak 3B yazıcı ile üretilen test numunelerinin sürünme davranışlarının deneysel olarak incelenmesi

“…Romeijn vd. [12] UV (Ultraviyole) radyasyonu, sıcaklık, nem gibi çevresel faktörlerin, 3B yazıcı ile Polietilen Tereftalat Glik (PETG) malzeme kullanılarak imal edilen test numunelerinin eğilme gerilmesi altındaki sürünme davranışını deneysel olarak incelemişlerdir. Zhang vd.…”

Optimization of fused filament fabrication process parameters for mechanical responses of weather‐resistant polymer (acrylonitrile styrene acrylate)

“…Several researchers are focused on identifying the suitable polymer material that can be sustained under the various outdoor environmental conditions (UV exposure, moisture, heat and mechanical loading). [10][11][12][13][14][15][16] Various AM techniques are integrated into the diverse industries to manufacture the polymeric products rapidly. In particular, fused filament fabrication (FFF) is the most widely used technique among all the others AM techniques, due to its versatility and affordability features.…”