Toughened blends of polystyrene and polybutadiene filled with chalk

Braun, Dietrich; Klein, Marek; Hellmann, G. P.

doi:10.1002/(sici)1097-4628(19960516)60:7<981::aid-app8>3.0.co;2-i

Cited by 6 publications

(7 citation statements)

References 2 publications

(2 reference statements)

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“…This result is in agreement with the known fact that the tensile modulus of the composite PS/PB decreases with an increasing rubber phase volume fraction ϕ (fraction of rubber + occluded polystyrene). Taking into account the experimental relationship between both magnitudes given by Braun et al3 or Maestrini et al,2 the HIPS modulus from Table I corresponds to ϕ ≈ 0.2.…”

Section: Discussionmentioning

confidence: 90%

“…Recent works in HIPS are dedicated to the study of the modification of the impact strength, tensile strength, and relative elongation by using different types of elastomers, different elastomer particle size, etc 1–5. However, the dynamic mechanical relaxation processes are intimately associated with the stiffness and impact toughness, among other physical properties 6.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic mechanical behavior of atactic and high-impact polystyrene

Goyanes

2000

J. Appl. Polym. Sci.

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ABSTRACT:Results of the dynamic mechanical behavior of atactic polystyrene (PS) and high-impact polystyrene (HIPS) for temperatures between 300 and 425 K at a frequency of the order of 50 kHz are presented. The storage Young's modulus, (EЈ), of the HIPS is lower than the PS value, being the relationship between them a function of the rubber phase volume fraction, independent of the measurement frequency. The glass transition temperature (T g ) of HIPS is shifted to lower temperature in respect to the PS. The ␥ relaxation appears at 308 K in PS at 50 kHz, while it seems to move toward lower temperatures in the HIPS. Both shifts are attributed to the presence of mineral oils in the HIPS. The values of EЈ, T g , and the temperature of the ␥ relaxation at 50 kHz are discussed within the scope of the theory of viscoelasticity. Finally, the effect of thermal treatments, using different annealing times, on the behavior of both materials is shown.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical behavior of atactic and high-impact polystyrene

Goyanes

2000

J. Appl. Polym. Sci.

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“…The copolymerization of PS with elastomeric materials give it a greater impact resistance compared to the pure polymer; this allows its extensive use in packaging, containers, electronics, computers, and many other disposable products 1–3. The resulting polymer is a high‐impact polystyrene (HIPS) and may be regarded as a two‐phase blend of materials with different viscoelastic properties 4, 5…”

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties of wood flour–polystyrene blends from postconsumer plastic waste

Lisperguer

Bustos

Saravia

2010

J of Applied Polymer Sci

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Polystyrene (PS) from packing materials and plastic cups was reinforced with 30 and 50% wood flour through a blending process with and without a commercial compatibilizing agent. The processability of the pure recycled polystyrene (rPS) and wood-rPS composites was studied in terms of the torque of the mixing process; this was then compared with that of a commercial virgin multipurpose PS. The physical and mechanical properties were compared with those of the virgin PS reinforced with 30 and 50% wood flour. The results show that the mechanical properties of the pure and reinforced rPS did not decrease with respect to the virgin PS, and in terms of the impact strength, the rPS was superior to the virgin plastic. The mechanical properties were not affected by the commercial compatibilizing agent, but the torque of the blends was significantly lower with the compatibilizer. Differential scanning calorimetry (DSC) and dynamic mechanical analysis were used to study the glass-transition temperature (T g ) of both the pure virgin PS and pure rPS and the wood flour-PS composites. The T g values of the rPS and wood-rPS composites were higher than those of the virgin PS and wood-virgin PS composites. The use of rPS increased the stiffness and flexural modulus of the composites. Thermogravimetric analysis revealed that the thermal stability of rPS and its composites was slightly greater than that of the virgin PS and its composites. These results suggest that postconsumer PS can be used to obtain composite materials with good mechanical and thermal properties.

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“…It is believed that the careful incorporation of high modulus and rubbery materials in the same composite could result in an improvement in both the modulus and impact strength. [17][18][19][20][21][22][23][24][25] Multicomponent composites consisting of matrix, rubber, and filler are expected to exhibit fairly complex behaviors. Filler-matrix, filler-rubber, and rubber-matrix interfaces and/or interphases may be involved.…”

Section: Introductionmentioning

confidence: 99%