Rubber-modified Plastics

Bucknall, C. B.

doi:10.1016/b978-0-08-096701-1.00205-6

Cited by 15 publications

(8 citation statements)

References 121 publications

(22 reference statements)

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“…18 The decrease in modulus with increasing the elastomer content is expected and well reported for rubber toughening of rigid polymers. 8 The Young's modulus is higher for photoaged samples, but the dependence of this property on the blend composition (up to 11 wt % of EPDM) is not affected by aging. The Young's modulus of the nonaged PS/EPDM blends (between 973 and 1363 MPa), except for 14E60 and 17E60 (591 and 554 MPa, respectively), are higher than the Young's modulus of the nonaged HIPS (786 MPa).…”

Section: Resultsmentioning

confidence: 98%

“…4,7 To overcome this problem, it has been suggested that PB be replaced in the polymer composition by a saturated rubber such as poly(ethylene-co-propylene-co-2-ethylidene-5-norbornene), EPDM. 8 Aging of polymeric materials may be defined as a progressive deterioration of the physical properties because of the action of heat, oxygen, UV radiation, or mechanical work, either separately or in combination. Degradation of polymers includes all changes in chemical structure and physical properties of polymers because of external chemical or physical stresses leading to materials with characteristics different from those of the starting material.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of photoaged in situ polymerized PS/EPDM blends

Lourenço

Felisberti

2007

J of Applied Polymer Sci

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In this study, the mechanical properties of in situ polymerized PS/EPDM blends with different composition were evaluated before and after accelerated photoaging and compared with the properties of commercial HIPS submitted to similar aging conditions (ASTM G53). The mechanical properties of the PS/EPDM blends as well as their photochemical stability are influenced by the polymerization temperature and blend composition. Although the initial mechanical properties of HIPS are superior in comparison with the in situ polymerized PS/EPDM blends, a pronounced drop of them was observed already for short time exposure. For example, after the aging period, all PS/EPDM blends showed higher strain at break than HIPS. Because PS/EPDM blends present higher resistance to photoaging stability than HIPS, the mechanical properties of the HIPS become worse than the other blends as the aging time increases.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Mechanical properties of photoaged in situ polymerized PS/EPDM blends

Lourenço

Felisberti

2007

J of Applied Polymer Sci

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“…In toughening a ductile polymer such as polyamide, Wu ( 3 ) argued that the general toughening condition is that the interparticle spacing must be smaller than a critical value, which is independent of particle size and rubber volume fraction. Wu also argued that Van der Waals attraction gives sufficient adhesion for PS, it is generally recognized that rubber particles of 1 to 3 pm in diameter and strong interfacial adhesion are required for effective toughening (5)(6)(7). More recently, however, a number of investigators have shown that toughening of PS is effective with dual rubber particle size population if most particles are below 1 pm (8, 9).…”

Section: Introductionmentioning

confidence: 99%

The separate roles of phase structure and interfacial adhesion in toughening a brittle polymer

Liu

Baker

1992

Polymer Engineering & Sci

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The effects of rubber particle size and rubber/matrix adhesion on the impact properties of a brittle polymer have been separated using polystyrene (PS)/acrylonitrile‐butadiene rubber (NBR) as a model system in which interfacial chemical reaction could be controlled. It has been proven that the interfacial adhesion between the rubber phase and the PS matrix not only greatly aids in reducing the rubber particle size but also plays a further role in improving the impact properties of the matrix polymer. The impact energies of PS/NBR blends with interfacial chemical bonding are four to ten times as high as those without interfacial bonding for the same average rubber particle size. However, at temperatures below the glass transition temperature of the rubber, there is no difference in impact energies with or without interfacial chemical bonding. It has been found that the optimum rubber particle size for toughening PS is influenced by interfacial adhesion. Smaller optimum rubber particle size is observed for blends with greater amounts of interfacial chemical bonding.

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“…5 Lactams, such as -caprolactam, are another special group of reactive solvents, whose polarity can favor solubility of various polymers. For example, less polar lauryllactam is a better solvent for PE, while more polar -caprolactam easily solve PEI, PPE, PSF, rubbers with functional groups, etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of polyphenylene oxide content on morphology, thermal, and mechanical properties of polyphenylene oxide/polyamide 6 blends

Xie²,

Yang

2005

J of Applied Polymer Sci

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ABSTRACT:A series of composites of PPO/PA 6 with improved toughness were synthesized by using -caprolactam as a reactive solvent. Inserting minor PPO macromolecules (1-3 wt %) into PA 6 matrix obviously reduced the crystallinity of PA6. Two crystallization temperatures were found when 6 wt % PPO was added. SEM revealed that the phase morphology of the composites could be manipulated by varying the content of PPO in PA 6. As a consequence, the impact strength and the elongation of PPO/PA6 were improved with maintenance of tensile strength when quite small content of PPO (1-3 wt %) was incorporated.

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Rubber-modified Plastics

Cited by 15 publications

References 121 publications

Mechanical properties of photoaged in situ polymerized PS/EPDM blends

Mechanical properties of photoaged in situ polymerized PS/EPDM blends

The separate roles of phase structure and interfacial adhesion in toughening a brittle polymer

Effects of polyphenylene oxide content on morphology, thermal, and mechanical properties of polyphenylene oxide/polyamide 6 blends

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