Dynamic behavior of gamma-irradiated polycarbonate

Weber, Ricardo Pondé; Vecchio, Kenneth S.; Suarez, João Carlos Miguez

doi:10.1590/s1517-70762010000200019

Cited by 9 publications

(14 citation statements)

References 15 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lee and Kim [17] and Dioh et al [18] studied the effect of the specimen thickness on the behavior at high strain rate. Weber et al [19] measured the high strain rate behavior of gamma-irradiated polycarbonate. Trautmann et al focused on the specimen lubrication at cryogenic temperatures [20].…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Strain Rate Dependency of Polycarbonate’s Yield Stress: Evaluation of Four Constitutive Equations

Al-Juaid

Othman

2016

Journal of Engineering

View full text Add to dashboard Cite

The main focus of this paper is in evaluating four constitutive relations which model the strain rate dependency of polymers yield stress. Namely, the two-term power-law, the Ree-Eyring, the cooperative, and the newly modified-Eyring equations are used to fit tensile and compression yield stresses of polycarbonate, which are obtained from the literature. The four equations give good agreement with the experimental data. Despite using only three material constants, the modified-Eyring equation, which considers a strain rate-dependent activation volume, gives slightly worse fit than the three other equations. The two-term power-law and the cooperative equation predict a progressive increase in the strain rate sensitivity of the yield stress. Oppositely, the Ree-Eyring and the modified-Eyring equations show a clear transition between the low and high strain rate ranges. Namely, they predict a linear dependency of the yield stress in terms of the strain rate at the low strain rate range. Crossing a threshold strain rate, the yield stress sensitivity sharply increases as the strain rate increases. Hence, two different behaviors were observed though the four equations fit well the experimental data. More experimental data, mainly at the intermediate strain rate range, are needed to conclude which, of the two behaviors, is more appropriate for polymers.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling of the Strain Rate Dependency of Polycarbonate’s Yield Stress: Evaluation of Four Constitutive Equations

Al-Juaid

Othman

2016

Journal of Engineering

View full text Add to dashboard Cite

show abstract

“…Most measured & calculated properties of samples at different concentrations are increase linearly with polymer concentration in chloroform this accompanied by decrease in most of physical properties after radiation, except some of them as in tables(1-4) and figures (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). Considering viscosity as a relaxation phenomenon, the increases in the values of viscosity with increasing concentration could be attributed to the complex formation between molecules of this polymer in Chloroform [22] .…”

Section: Resultsmentioning

confidence: 99%

“…Polycarbonate, has found many applications in several industrial fields due to its high toughness, good ductility, high glass transition temperature, excellent optical clarity and dimensional stability [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

تأثير شعاع المصدر على بعض الخواص الفيزيائية للبولي كربونات في الكلوروفورم عند درجة حرارة الغرفة

Hadi Gali Attia,

Hadil Adil

2023

cbej

View full text Add to dashboard Cite

الهدف من هذا العمل هو دراسة تأثير أشعة جاما على بعض الخواص الريولوجية والبصرية لمحلول البولي كربونات في الكلوروفورم بتركيزات مختلفة قبل وبعد الإشعاع مع المصدر بمعدل 508 (راد / دقيقة) لمدة 40 دقيقة.بعض أنواع اللزوجة ، الامتصاص البصري ، معامل الانكسار ، متوسط اللزوجة الوزن الجزيئي ، نصف القطر الجزيئي الفعال ، الانعكاسية ، معامل البراعة ، الانعكاس النوعي.أظهرت النتائج أن معظم الخصائص المقاسة والمحسوبة تزداد مع التركيز في المذيب ، لكن قيم الكثافة ، ولزوجة القص ، والوزن النسبي ، والمحدود ، والمخفض ، والوزن الجوهري والجزيئي تزداد مع الإشعاع ، وتزداد قيم الامتصاصية ، ومعامل الانكسار ، ومعامل البراعة. بالإشعاع ، يمكن أن يعزى ذلك إلى تحلل يؤدي إلى منتجات الغازات.

show abstract

“…The clay modifiers used as fire retardant materials with good mechanical properties which reduce the 'Tg' of polymer-clay NCs as a result of weaker organoclay-polymer interactions [48][49][50][51][52][53][54][55][56]. The inclusion of the nano-clay to extend the stiffness of pristine PC and awesome outcomes in tribological properties were also obtained [57][58][59][60][61][62][63][64][65][66][67].…”

Section: Polycarbonate (Pc)/clay Ncs (Pccncs)mentioning

confidence: 99%

Nano Clay Reinforcement of Thermoplastics for Engineering Applications

Santhosh¹

2022

Materials Research Foundations

View full text Add to dashboard Cite

Thermoplastics are widely used advanced materials in various fields as an essential product. The increasing interest in replacing thermosets due to their advanced properties such as high toughness, manufacturing time and processing possibilities. Thermoplastics exhibit poor mechanical properties in several engineering applications; hence the use of nano clay minerals enhances the mechanical property of thermoplastics to be used in many engineering applications. The reinforcing effect of clay minerals (nano-clay) in various thermoplastics such as polycarbonate (PC), polypropylene (PP), Acrylonitrile butadiene styrene (ABS) and high-density polyethylene (HDPE), which are popularly known as commodity plastics and are widely used in fabricating automotive parts and household articles. The frequently used clay minerals such as montmorillonite, bentonite, hectorite, halloysites and kaolinite as filler material in thermoplastics make them suitable in many engineering applications with enhanced mechanical properties. The integration of clay minerals into a polymer matrix allows both properties from clay minerals and polymer to be combined so as to exploit entirely new functionalities. In recent years, owing to a number of practical applications in the field of opto-electronics, a great deal of interest has been paid to study optical, dielectric and conduction behaviours of various polymeric materials. This chapter is designed to be a source for nano-clay reinforced thermoplastic nano-composite research including synthesis, characterization, structure/property relationship and applications considering optical and electrical conductivity which are discussed.

show abstract

Dynamic behavior of gamma-irradiated polycarbonate

Cited by 9 publications

References 15 publications

Modeling of the Strain Rate Dependency of Polycarbonate’s Yield Stress: Evaluation of Four Constitutive Equations

Modeling of the Strain Rate Dependency of Polycarbonate’s Yield Stress: Evaluation of Four Constitutive Equations

تأثير شعاع المصدر على بعض الخواص الفيزيائية للبولي كربونات في الكلوروفورم عند درجة حرارة الغرفة

Nano Clay Reinforcement of Thermoplastics for Engineering Applications

Contact Info

Product

Resources

About