Aging behavior and lifetime prediction of PMMA under tensile stress and liquid scintillator conditions

Yin, Wei; Xie, Zeyu; Yin, Yuming; Yi, Jiawei; Liu, Xiaodan; Wu, Hao; Wang, Shuang; Xie, Yufang; Yu-nong, Yang

doi:10.1016/j.aiepr.2019.04.002

Cited by 17 publications

(21 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shift factors provided by the TTS transformation are displayed on an Arrhenius plot (inset in Figure 5). If the UTS data can be described by an Arrhenius model, the plot of the logarithm of the shift factors as a function of the inverse of the absolute temperature will show a linear relationship as described in Equation () 35 . In Equation (), a T are the shift factors, T and T ref are the absolute temperatures of the shifted and the reference data, respectively, E a is the activation energy of the degradation process leading to the loss in performance, and R is the universal gas constant (8.31 J K −1 mol −1 ).…”

Section: Resultsmentioning

confidence: 99%

Investigation of the accelerated thermal aging behavior of polyetherimide and lifetime prediction at elevated temperature

Cho

Nam

Mata

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Fire‐protective clothing are manufactured using heat and flame resistant fibers that are made of high‐performance polymers. These polymers exhibit a gradual reduction in their performance after long‐term exposure under various aging conditions. This study investigates the thermal aging behavior of a high‐temperature resistance polymer, polyetherimide (PEI), at elevated temperatures in air. Changes in the ultimate tensile strength (UTS), glass transition temperature, and surface properties are observed. In addition, infrared spectroscopy identifies chemical bonds in PEI being consumed because of chain scission. Applying the time–temperature superposition principle to the UTS data gives an activation energy of 112 kJ mol−1 for the effect of thermal aging on the mechanical strength of PEI. This value is similar to what has been reported for fire‐protective clothing fabrics, which opens the possibility to use PEI as a sensing material for the development of end‐of‐life sensors for fire‐protective fabrics.

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation of the accelerated thermal aging behavior of polyetherimide and lifetime prediction at elevated temperature

Cho

Nam

Mata

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The external stress σ is negatively correlated with relaxation time when the temperature remains constant. PC tends to be subjected to a large tensile stress in the direction of the deformation by uniaxial hot compression 31 . Therefore, the kinetic activation energy of molecular segments in this direction is reduced.…”

Section: Resultsmentioning

confidence: 99%

“…PC tends to be subjected to a large tensile stress in the direction of the deformation by uniaxial hot compression. 31 Therefore, the kinetic activation energy of molecular segments in this direction is reduced. The special effect is similar to heating, which decreases the relaxation time of the segment movement.…”

Section: Self-reinforced Mechanismmentioning

confidence: 99%

Mechanical behavior and molecular orientation of polycarbonate plates prepared by press‐induced deformation

Wang

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

Through a uniaxial hot compression method, polycarbonate (PC) plates were self-reinforced effectively by press-induced deformation. Relationships between macroscopic mechanical properties including tensile, impact as well as viscoelastic properties, and microscopic status such as morphologies and orientation were obtained in deformed PC plates. Results showed that PC plates which were compressed at appropriate temperatures (20 C-120 C) obtained simultaneous enhancements in tensile strength (28%), elastic modulus (38%) and impact strength (700%), compared with the original plate. The impact fracture morphologies of deformed PC plates revealed evident ductile breakage. Wide-angle X-ray diffraction investigations were conducted to attribute mechanical behavior to molecular segment orientation, which was more sensitive to temperature. Self-reinforced mechanism was proposed to analyze the high correlation between various orientations of molecular segments and corresponding mechanical performance, explained by storage and loss moduli in dynamic mechanical analysis as supplemental verification. Press-induced deformation was proved to be a potentially effective method for the self-reinforcement treatment for PC transparent products.

show abstract

“…Yin et al (2019) [ 106 ] investigated the aging behavior of PMMA in a liquid scintillator at different temperatures under static tensile stress with dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). Then, the service life of the PMMA was predicted based on the time–temperature superposition approach.…”

Section: Methods For Predicting the Lifetime Of Polymeric Materialmentioning

confidence: 99%

“…This methodology has turned out to be useful to predict the long-term viscoelastic behavior of plasticized polymers at temperatures below the T g temperatures based on short-term creep experimental data. Yin et al (2019) [106] investigated the aging behavior of PMMA in a liquid scintillator at different temperatures under static tensile stress with dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). Then, the service life of the PMMA was predicted based on the time-temperature superposition approach.…”

Section: Time-temperature Superpositionmentioning

confidence: 99%

Lifetime Prediction Methods for Degradable Polymeric Materials—A Short Review

Plota

Masek

2020

Materials

View full text Add to dashboard Cite

The determination of the secure working life of polymeric materials is essential for their successful application in the packaging, medicine, engineering and consumer goods industries. An understanding of the chemical and physical changes in the structure of different polymers when exposed to long-term external factors (e.g., heat, ozone, oxygen, UV radiation, light radiation, chemical substances, water vapour) has provided a model for examining their ultimate lifetime by not only stabilization of the polymer, but also accelerating the degradation reactions. This paper presents an overview of the latest accounts on the impact of the most common environmental factors on the degradation processes of polymeric materials, and some examples of shelf life of rubber products are given. Additionally, the methods of lifetime prediction of degradable polymers using accelerated ageing tests and methods for extrapolation of data from induced thermal degradation are described: the Arrhenius model, time–temperature superposition (TTSP), the Williams–Landel–Ferry (WLF) model and 5 isoconversional approaches: Friedman’s, Ozawa–Flynn–Wall (OFW), the OFW method corrected by N. Sbirrazzuoli et al., the Kissinger–Akahira–Sunose (KAS) algorithm, and the advanced isoconversional method by S. Vyazovkin. Examples of applications in recent years are given.

show abstract

Aging behavior and lifetime prediction of PMMA under tensile stress and liquid scintillator conditions

Cited by 17 publications

References 20 publications

Investigation of the accelerated thermal aging behavior of polyetherimide and lifetime prediction at elevated temperature

Investigation of the accelerated thermal aging behavior of polyetherimide and lifetime prediction at elevated temperature

Mechanical behavior and molecular orientation of polycarbonate plates prepared by press‐induced deformation

Lifetime Prediction Methods for Degradable Polymeric Materials—A Short Review

Contact Info

Product

Resources

About