Quantification of strain-induced damage in semi-crystalline polymers: a review

Zhang, Yi; Jar, P.‐Y. Ben; Xue, Shifeng; Li, Lin

doi:10.1007/s10853-018-2859-2

Cited by 57 publications

(35 citation statements)

References 123 publications

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“…Crystalline polymers such as polyethylene and polyethylene terephthalate are indispensable for our daily lives. Their mechanical and optical properties strongly depend on their crystallinity 1 , which in turn is closely correlated to molding parameters. The crystallization of such synthetic polymers has been extensively studied, especially from a morphological and kinetic perspective 2 .…”

Section: Introductionmentioning

confidence: 99%

Crystallization-induced mechanofluorescence for visualization of polymer crystallization

et al. 2021

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The growth of lamellar crystals has been studied in particular for spherulites in polymeric materials. Even though such spherulitic structures and their growth are of crucial importance for the mechanical and optical properties of the resulting polymeric materials, several issues regarding the residual stress remain unresolved in the wider context of crystal growth. To gain further insight into micro-mechanical forces during the crystallization process of lamellar crystals in polymeric materials, herein, we introduce tetraarylsuccinonitrile (TASN), which generates relatively stable radicals with yellow fluorescence upon homolytic cleavage at the central C–C bond in response to mechanical stress, into crystalline polymers. The obtained crystalline polymers with TASN at the center of the polymer chain allow not only to visualize the stress arising from micro-mechanical forces during polymer crystallization via fluorescence microscopy but also to evaluate the micro-mechanical forces upon growing polymer lamellar crystals by electron paramagnetic resonance, which is able to detect the radicals generated during polymer crystallization.

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Section: Introductionmentioning

confidence: 99%

Crystallization-induced mechanofluorescence for visualization of polymer crystallization

et al. 2021

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“…Polymers are widely used in industries such as the aerospace industry, optical engineering, and biological engineering industry due to the excellent properties such as low-density, corrosion resistance, low coefficient of friction, and the possibility of mass production [ 1 , 2 , 3 , 4 , 5 , 6 ]. Among the various types of polymers, thermoplastics are difficult to cut due to their characteristic properties such as low modulus of elasticity, low thermal conductivity, high coefficient of thermal expansion, and internal stress [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Machinability of the Thermoplastic Polymers: PEEK, PI, and PMMA

Yan

Mao

et al. 2020

Polymers

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The thermoplastic polymer such as poly(methyl methacrylate) (PMMA), polyetheretherketone (PEEK), and polyimide (PI) is a kind of polymer material with properties of good mechanical strength. It has been widely used in the fields of aerospace, optical engineering, and microfluidics, etc. Thermoplastic polymers are considered to be one of the most promising engineering plastics in the future. Therefore, it is necessary to further study its mechanical properties and machinability, especially in ultra-precision machining. Furthermore, mechanical property and machinability were studied in this work. Through the dynamic mechanical analysis experiment, the elastic modulus and temperature effect of PMMA, PEEK, and PI are analyzed. In addition, the high-speed micromilling experiment is conducted to show that the surface roughness, burrs, and cutting chip characteristics in the high-speed micromilling process. In general, the surface quality of the brittle removal is generally better than that of the viscoelasticity state. The results show that PMMA, PEEK, and PI have good mechanical properties and machinability. Base on the results, the material will be in a viscoelastic state as the temperature increases. The surface quality of the brittle removal is generally better than the viscoelastic state.

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“…These advantages have attracted applications in many areas, ranging from plastic pipes for water and gas transportation to containers and film for material packaging. For PE used in load-bearing applications, the main concern is around PE’s time-, temperature-, and strain-rate-dependent mechanical properties [4,5,6]. This issue is further complicated by the semi-crystalline nature of PE’s microstructure, which has crystalline and amorphous phases mingled in a lamellar arrangement.…”

Section: Introductionmentioning

confidence: 99%

Determining Deformation Transition in Polyethylene under Tensile Loading

Tan

Jar

2019

Polymers

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The multi-relaxation (MR) test was developed based on the concept that stress relaxation behavior can be used to reflect the material state of polyethylene (PE) under tension. On the basis of this concept, critical stroke for the onset of plastic deformation in the crystalline phase, named the first critical stroke, was determined using the MR test. Results from wide angle X-ray scattering suggest that phase transformation occurred in the crystalline phase of PE after the specimen was stretched beyond the first critical stroke. In this work, the MR test was applied to six PEs of different mass densities to determine their first critical strokes and the corresponding total and quasi-static (QS) stress values. The results show that the first critical stroke had very similar values among the six PEs. More interestingly, the ratio of the QS stress at the first critical stroke to the yield stress from the standard tensile test showed little dependence on PE density. Therefore, it was possible to use the popular short-term tensile test to characterize the critical QS component of the applied stress to initiate plastic deformation in the crystalline phase, which is expected to play a significant role on the long-term, load-carrying applications of PE.

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Quantification of strain-induced damage in semi-crystalline polymers: a review

Cited by 57 publications

References 123 publications

Crystallization-induced mechanofluorescence for visualization of polymer crystallization

Crystallization-induced mechanofluorescence for visualization of polymer crystallization

Machinability of the Thermoplastic Polymers: PEEK, PI, and PMMA

Determining Deformation Transition in Polyethylene under Tensile Loading

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