The role of filler volume fraction in the strain‐rate dependence of calcium carbonate‐reinforced polyethylene

Suwanprateeb, Jintamai; Tiemprateeb, S.; Kangwantrakool, Sukasem; Hemachandra, K.

doi:10.1002/(sici)1097-4628(19981128)70:9<1717::aid-app9>3.3.co;2-n

Cited by 6 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reduction of yield stress on increasing CaCO 3 content in polyolefins is reported by several investigators [26][27][28], while a reduction of yield stress with SA content in CaCO 3 /polyolefin composites is also reported by some investigators [27][28]. The main difference between our work and those reported in the literature is the filler particle size.…”

Section: Tension Testssupporting

confidence: 54%

Filler toughening of plastics. Part 1—The effect of surface interactions on physico-mechanical properties and rheological behaviour of ultrafine CaCO3/HDPE nanocomposites

Lazzeri

Zebarjad

Pracellà³

et al. 2005

Polymer

181

164

View full text Add to dashboard Cite

Section: Tension Testssupporting

confidence: 54%

Filler toughening of plastics. Part 1—The effect of surface interactions on physico-mechanical properties and rheological behaviour of ultrafine CaCO3/HDPE nanocomposites

Lazzeri

Zebarjad

Pracellà³

et al. 2005

Polymer

181

164

View full text Add to dashboard Cite

“…The system displays non-Newtonian flow. Comparison of the contribution of CaCO 3 and MA shows that the viscosity of the mixture BMA/ MA/CaCO 3 increases evidently with the amount of CaCO 3 . It is enhanced by a factor 10 3 when the CaCO 3 content increases from 3 to 30%.…”

Section: Evolution Of the Viscosity With The Filler Contentmentioning

confidence: 97%

“…Calcium carbonate is widely used as a commodity plastic filler because of its low cost and its ability to modify mechanical properties such as modulus, hardness, and toughness. Thermal resistance, flame retardancy, and dimensional stability can also be improved 1–4. The addition of calcium carbonate may also enhance the polymer processing behaviors by inducing, for example, low and controllable die swell 5…”

Section: Introductionmentioning

confidence: 99%

“…Thermal resistance, flame retardancy, and dimensional stability can also be improved. [1][2][3][4] The addition of calcium carbonate may also enhance the polymer processing behaviors by inducing, for example, low and controllable die swell. 5 Calcium carbonate is considered as a chemically inert filler when blended with polyolefin, in which the filler/matrix interfaces are weak.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rheology of poly(n‐butyl methacrylate) and its composites with calcium carbonate

Chen

Carrot

Chalamet

et al. 2003

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(n-butyl methacrylate) (PBMA) composites with calcium carbonate (CaCO 3 ) were prepared by in situ radical copolymerization of butyl methacrylate (BMA) and methacrylic acid (MA) with precipitated calcium carbonate. To compare the different rheological behaviors of the monomer mixtures with CaCO 3 and the composites, the steady and dynamic viscosities of BMA/MA/CaCO 3 and poly(BMA/MA/CaCO 3 ) were measured by means of steady and oscillatory shear flows. The viscosity of the mixture BMA/MA/CaCO 3 was found to increase evidently with the increasing of CaCO 3 %. The influence of MA% on viscosity of BMA/MA/CaCO 3 was slight. During the in situ polymerization, the viscosity of the reacting system was measured to be enhanced by a factor of about 10 4 from the monomer/ CaCO 3 mixture to composites. The dependency of zeroshear viscosity on molar mass of PBMA was also investigated. The relation between the zero-shear viscosity and molar mass is 0 ϭ 10 Ϫ15 M w 3.5 . The evolution of the viscosity with the temperature for both PBMA and its composites was obtained and time-temperature superposition was used to build master curves for the dynamic moduli. The flow activation energies were found to be 115.0, 148.6, and 178.7 kJ/mol for PBMA, composite PBMA/CaCO 3 (90/10), and PBMA/MA/CaCO 3 (89/1/10), respectively. The viscosity of the composites containing less than 10% CaCO 3 was lower than that of pure PBMA with the same molar mass.

show abstract

“…In tensile tests with constant strain rates, the distribution of mesoregions with various rates of relaxation results in a strong dependence of Young's modulus on the rate of loading, since the elastic modulus of a polymer is associated with that of mesodomains that do not relax within the experimental time-scale. The latter is confirmed by the experimental data that reveal an increase in elastic moduli with the strain rate, [32,33]. To account for the spatial heterogeneity of a network, we treat it as an ensemble of mesoregions that can slide with respect to each other in the post-yield region of deformations.…”

mentioning

confidence: 62%

Finite viscoplasticity of semicrystalline polymers

Drozdov¹,

Christiansen

2003

Archive of Applied Mechanics (Ingenieur Archiv)

View full text Add to dashboard Cite

A series of uniaxial tensile tests is performed on isotactic polypropylene at room temperature with cross-head speeds ranging from 5 to 100 mm/min. Prior to mechanical testing, injection-molded samples are annealed for 24 h at the temperature 160 C that ensures that the specimens can be drawn up to the Hencky strain of 0.6 without necking. A constitutive model is derived for the viscoplastic behavior of a semicrystalline polymer at finite strains. The stress-strain relations are determined by five adjustable parameters that are found by matching the observations. Fair agreement is demonstrated between the experimental data and the results of numerical simulation. It is shown that the material parameters in the constitutive equations are strongly affected by the strain rate. IntroductionThis paper is concerned with the effect of strain rate on the viscoplastic behavior of the injection-molded isotactic polypropylene (iPP) in isothermal uniaxial tensile tests at finite strains. The interest to the mechanical response of iPP is caused by its many industrial applications, ranged from oriented films for packaging to non-woven fabrics and reinforcing fibres. The influence of strain rate on the yield stress, defined as the point of maximum on the engineering stress-engineering strain curve, has been the focus of attention of some papers on polypropylene in the past decade, [1][2][3][4].The iPP is a semicrystalline polymer containing three basic crystallographic forms, [5]: monoclinic a-crystallites, (pseudo) hexagonal b-structures, orthorhombic c-polymorphs, and smectic mesophase, which consists of arrays of chains with a better order in the longitudinal than in transverse chain direction. At rapid cooling of the melt, which is typical of the injection-molding process, a-crystallites and smectic mesophase are mainly developed, whereas b-and c-polymorphs are observed as minor components, [6].The characteristic size of a-spherulites in an injection-molded specimen is estimated at 100-200 lm, [6, 7]. These structures are formed by lamellae stacks with lamellar thicknesses ranging from 10 to 20 nm, [7,8]. A unique feature of the crystalline morphology of iPP is the lamellar cross-hatching: development of transverse lamellae oriented in the direction perpendicular to the direction of radial lamellae in spherulites, [5,8].Transmission electron microscopy (TEM), [8,9], and polarized optical microscopy, [9], show that annealing of iPP at elevated temperatures results in

show abstract

The role of filler volume fraction in the strain‐rate dependence of calcium carbonate‐reinforced polyethylene

Cited by 6 publications

References 0 publications

Filler toughening of plastics. Part 1—The effect of surface interactions on physico-mechanical properties and rheological behaviour of ultrafine CaCO3/HDPE nanocomposites

Filler toughening of plastics. Part 1—The effect of surface interactions on physico-mechanical properties and rheological behaviour of ultrafine CaCO3/HDPE nanocomposites

Rheology of poly(n‐butyl methacrylate) and its composites with calcium carbonate

Finite viscoplasticity of semicrystalline polymers

Contact Info

Product

Resources

About