The Role of Impact Modifier Particle Size and Adhesion on the Toughness of PET

Pecorini, Thomas J.; Calvert, D.

doi:10.1021/bk-2000-0759.ch009

Cited by 4 publications

(3 citation statements)

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“…[24][25][26][27][28] Figure 2 shows SEM pictures for the blends containing 4 and 10 wt % modifier. As shown in the figure, the samples prepared at low shear rates had larger dispersed particles regardless of the modifier content.…”

Section: Effect Of the Blade Rotation Speedmentioning

confidence: 99%

“…22 We also found in our previous study that the addition of the reactive modifier, however, caused a loss of transparency in the extrudates, which was due to light scattering from the dispersed particles with different refractive indices. 22,24 In this study, the relation between the mixing conditions in an internal mixer and the structure of the blend was investigated in detail to design a highperformance polyester with good transparency and appropriate rheological properties.…”

Section: Introductionmentioning

confidence: 99%

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Effect of mixing conditions on the rheological and optical properties of chemically modified poly(ethylene terephthalate‐co‐ethylene isophthalate)

Yamaguchi

Wakabayashi

Kanoh

2007

J of Applied Polymer Sci

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ABSTRACT:The optical properties and rheological properties were studied for binary reactive blends composed of poly(ethylene terephthalate-co-ethylene isophthalate) [P(ET-EI)] and a styrene-acrylate based copolymer with glycidyl functionality. The blade rotation speed in the internal mixer greatly affected the structure and properties for the blend system. Intensive mixing at a high rotation speed enhanced the optical transparency because of the reduced particle size of the dispersed phase. The graft copolymer generated by the reaction between P(ET-EI) and the modifier was responsible for the fine morphology. Furthermore, the copolymer also enhanced the elastic nature in the molten state because it acted as a long-chain branched polymer.

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Section: Effect Of the Blade Rotation Speedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of mixing conditions on the rheological and optical properties of chemically modified poly(ethylene terephthalate‐co‐ethylene isophthalate)

Yamaguchi

Wakabayashi

Kanoh

2007

J of Applied Polymer Sci

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“…Chakrabarty et al22 reported that the fracture mechanism in an epoxy resin/poly(ethyl methacrylate) interpenetrating polymer network changes from shear to craze formation accompanying an increase in the content of poly(ethyl methacrylate). The work done by Pecorini and Calvert23 has made it clear that reactive ethylene/methyl acrylate/glycidyl methacrylate ternary copolymer/PET with dispersed particles smaller than 200 nm shows super‐toughness due to the massive shear yielding of the matrix, whereas with dispersed particles larger than 200 nm, it exhibits super‐toughness due to multiple crazing of the matrix. With regard to the improvement of impact resistance due to cavitation or microvoid formation, Hobbs et al24 reported that a combination of cavitation and shear deformation absorbed impact energy in a polyester/(bisphenol A) PC polymer alloy.…”

Section: Introductionmentioning

confidence: 99%

Phase separation and mechanical properties of polyketone/polyamide polymer alloys

Kato¹,

Nishioka²,

Takahashi³

et al. 2010

J of Applied Polymer Sci

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ABSTRACT:We have investigated polyketone (PK)/ polyamide 6 (PA) polymer alloys having enhanced Charpy impact energy greater than that of polycarbonate (PC) as a result of moisture absorption. From the results of differential scanning calorimetry (DSC), Raman spectroscopy, and transmission electron microscope (TEM) observation of the polymer alloys, it was found that PK-rich and PA-rich phases exist at the nanometer level in the polymer alloys; however, a microscopic interaction phase formed between the two phases. 3D-TEM observations, electron energy loss spectroscopy, and small-angle X-ray scattering measurements revealed that a co-continuous nanolayer formed from the PA-rich phase and lamella network of the PKrich phase. Moreover, the interaction and mobility of PK and PA molecular chains were investigated by using a 13 C cross polarization/magic angle sample spinning NMR technique. It was found that moisture absorption markedly enhances the mobility of PA molecular chains in PK/PA alloys. This suggests that the wet (moisture-absorbed) PA phase of PK/PA alloys allows quick deformation upon impact stimulation. On the other hand, the results of Charpy impact tests showed that the total impact energy (E total ) of the wet polymer alloy was much higher than that of the dry one. An examination of the load-displacement curves revealed that the wet samples showed a pronounced increase in displacement compared with the dry ones. From these results, it was concluded that the lamella network of the PK-rich phase sustains the maximum stress and that the large displacement of the PA-rich phase increases the impact energy.

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Additives for the Modification of Poly(Ethylene Terephthalate) to Produce Engineering‐Grade Polymers

Scheirs¹

2004

Modern Polyesters: Chemistry and Technology of Polyesters and Copolyesters

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The Role of Impact Modifier Particle Size and Adhesion on the Toughness of PET

Cited by 4 publications

References 0 publications

Effect of mixing conditions on the rheological and optical properties of chemically modified poly(ethylene terephthalate‐co‐ethylene isophthalate)

Effect of mixing conditions on the rheological and optical properties of chemically modified poly(ethylene terephthalate‐co‐ethylene isophthalate)

Phase separation and mechanical properties of polyketone/polyamide polymer alloys

Additives for the Modification of Poly(Ethylene Terephthalate) to Produce Engineering‐Grade Polymers

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