Temperature and strain rate sensitivity of yield strength of amorphous polymers: Characterization and modeling

Yang, Mengqing; Li, Weiguo; Dong, Pan; Ma, Yanli; He, Yan; Zhao, Zhongyong; Chen, Liming

doi:10.1016/j.polymer.2022.124936

Cited by 16 publications

(7 citation statements)

References 51 publications

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“…As shown in Figure 4, the logarithm of the elastic modulus of the PC material and the tensile strain rate was basically linear, and the basic form of the fitting formula is Equation (2), which is in consistent with the formula in Reference [17],…”

Section: Effect Of Strain Rate On the Mechanical Performancesupporting

confidence: 73%

“…Liu et al [16] studied the SHPB technique for the measurement of the dynamic strength of polymers, and used an iterative correction methodology to identify the actual strain-rate effect. Yang et al [17] studied the relationship between temperature and strain rate and gave the expression which can be used to describe the relationship between yield strength and strain rate. At present, although people have fully studied the mechanical properties of PC-based amorphous polymer materials, the data from tensile experiments at high strain rates are still relatively scarce, which limits the wide application of PC-based resins.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties and Fracture Microstructure of Polycarbonate under High Strain Rate Tension

et al. 2023

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In this paper, static and dynamic tensile tests were conducted on two kinds of polycarbonate (HL6157 and A1225BK), combined with the digital image correlation (DIC), for guiding the development of the battery pack of new energy vehicles. The mechanical properties of polycarbonate at low-speed (0.01/s) and high-speed (1/s, 100/s) tension were investigated and the microstructure of the fracture for polycarbonate at different speed tensions was also investigated. The fracture microstructure of two kinds of materials was also investigated in this paper. The tension results showed that as the strain rate increased, the yield strength and modulus increased, and the yield strength of the two materials increased by 30% under high-speed tension. In addition, the fracture strain increase was greater than 10% as the strain rate increased. Meanwhile, for polycarbonate, the strain rate increased, and the fracture toughness increased.

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Section: Effect Of Strain Rate On the Mechanical Performancesupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Fracture Microstructure of Polycarbonate under High Strain Rate Tension

et al. 2023

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“…The thermal and chemical properties of each polymer are correlated and confirmed by the literature. Polymers with a higher molecular mass tend to have lower T 5 and higher T g [ 59 , 66 ]. The thermal results are essential to define the process and working temperature of the porous material.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Biodegradable Polymers for Porous Structure: Further Steps toward Sustainable Plastics

Lima,

Mukherjee,

Picchioni

et al. 2024

Polymers

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Plastic pollution poses a significant environmental challenge, necessitating the investigation of bioplastics with reduced end-of-life impact. This study systematically characterizes four promising bioplastics—polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), and polylactic acid (PLA). Through a comprehensive analysis of their chemical, thermal, and mechanical properties, we elucidate their structural intricacies, processing behaviors, and potential morphologies. Employing an environmentally friendly process utilizing supercritical carbon dioxide, we successfully produced porous materials with microcellular structures. PBAT, PBS, and PLA exhibit closed-cell morphologies, while PHBV presents open cells, reflecting their distinct overall properties. Notably, PBAT foam demonstrated an average porous area of 1030.86 μm2, PBS showed an average porous area of 673 μm2, PHBV displayed open pores with an average area of 116.6 μm2, and PLA exhibited an average porous area of 620 μm2. Despite the intricacies involved in correlating morphology with material properties, the observed variations in pore area sizes align with the findings from chemical, thermal, and mechanical characterization. This alignment enhances our understanding of the morphological characteristics of each sample. Therefore, here, we report an advancement and comprehensive research in bioplastics, offering deeper insights into their properties and potential morphologies with an easy sustainable foaming process. The alignment of the process with sustainability principles, coupled with the unique features of each polymer, positions them as environmentally conscious and versatile materials for a range of applications.

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“…The strain rate dependent tensile strengths of PMMA, PAI, PC, and IPP at different temperatures were predicted by the model (Equation ()). For model predictions, the temperature dependent specific heat capacity, glass transition temperature and melting temperature of PMMA, PAI, PC, and IPP can be found from the literature 7,20,21 . The reference temperature T 0 for model predictions was chosen as 273 K. The used parameters are listed in Table 1.…”

Section: Theoretical Characterizationmentioning

confidence: 99%

Characterizing the temperature and strain rate dependent tensile strength of amorphous polymer by a theoretical model

2023

J of Applied Polymer Sci

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The temperature and strain rate dependent (TSRD) tensile strength of polymer closely concerns the service safety in wide temperature range and dynamic load. In this study, based on the decoupled modeling method, a theoretical model of TSRD tensile strength of amorphous polymer was established. The model quantifies the relationship between the TSRD tensile strength, Young's modulus, heat capacity, glass transition temperature and melting temperature of amorphous polymer. The model predictions demonstrated an excellent consistency with the experimental data. Furthermore, the influencing factors analysis regarding the TSRD tensile strength were conducted. This study contributes a theoretical method to conveniently predict the TSRD tensile strength of amorphous polymer, and would be helpful to the evaluation and application of polymer in extreme conditions.

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Temperature and strain rate sensitivity of yield strength of amorphous polymers: Characterization and modeling

Cited by 16 publications

References 51 publications

Mechanical Properties and Fracture Microstructure of Polycarbonate under High Strain Rate Tension

Mechanical Properties and Fracture Microstructure of Polycarbonate under High Strain Rate Tension

Characterization of Biodegradable Polymers for Porous Structure: Further Steps toward Sustainable Plastics

Characterizing the temperature and strain rate dependent tensile strength of amorphous polymer by a theoretical model

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