Stiffer and super-tough poly(butylene terephthalate) based blends by modification with phenoxy and maleated poly(ethylene–octene) copolymers

Aróstegui, A.; Nazábal, J.

doi:10.1016/s0032-3861(02)00496-2

Cited by 81 publications

(69 citation statements)

References 34 publications

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“…This indicated that the modifier phase did not disturb the crystallization process of PBT. The result agreed with the melting behavior observed in PBT/PEO-g-MA [19] and (PBT-Ph)/PEO-g-MA [20] blends and with reported results in other semicrystalline matrix/elastomer blends [21,22] . The DMA results are shown in Fig.…”

Section: Molecular Movementsupporting

confidence: 92%

Preparation of core-shell structured polyacrylic modifiers and effects of the core-shell weight ratio on toughening of poly(butylene terephthalate)

Yang

et al. 2014

Chin J Polym Sci

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Core-shell structured polyacrylic (named CSSP) impact modifiers consisting of a rubbery poly(n-butyl acrylate) core and a rigid poly(methyl methacrylate) shell with a size of about 353 nm were prepared by seed emulsion polymerization. The CSSP modifiers with different core-shell weight ratios (90/10, 85/15, 80/20, 75/25, 70/30, 65/35 and 60/40) were used to modify the toughness of poly(butylene terephthalate) (PBT) by melt blending. It was found that the polymerization had a very high instantaneous conversion (> 95.7%) and overall conversion (99.7%). The morphology of the core-shell structure was confirmed by means of transmission electron microscopy. Scanning electron microscopy was used to observe the morphology of the fractured surfaces. Differential scanning calorimeter was used to study the crystallization behaviors of PBT/CSSP blends. The dynamic mechanical analyses of PBT/CSSP blends showed two merged transition peaks of PBT matrix, with the presence of CSSP core-shell structured modifier, that were responsible for the improvement of PBT toughness. The results indicated that the notch impact strength of PBT/CSSP blends with a core-shell weight ratio of 75/25 was almost 8.64 times greater than that of pure PBT, and the mechanical properties agreed well with the SEM observation.

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Section: Molecular Movementsupporting

confidence: 92%

Preparation of core-shell structured polyacrylic modifiers and effects of the core-shell weight ratio on toughening of poly(butylene terephthalate)

Yang

et al. 2014

Chin J Polym Sci

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“…However, the addition of 0.2 phr of epoxy monomer increases the Young's modulus of the PBT blends at all elastomer wt.-% owing to its chain extension effect on PBT. Aróstegui and Nazábal [14] obtained similar results by modifying PBT and 20 wt.-% phenoxy mixture with maleated elastomers.…”

Section: Quantification Of Morphologymentioning

confidence: 60%

“…By adding the epoxy monomer to PBT/E-MA-GMA blends, finer particle dispersion relative to those blends without epoxy is observed at all E-MA-GMA levels, whose mean particle sizes are 119, 322 and 343 nm, respectively, for 10, 20, and 30 wt.-% elastomer (Figure 4b). Figure 5 shows the Young's modulus of the PBT blends (with and without epoxy monomer), like many other rubber-polymer systems, [3,9,14,15,22,23] decreases rapidly with E-MA-GMA content. However, the addition of 0.2 phr of epoxy monomer increases the Young's modulus of the PBT blends at all elastomer wt.-% owing to its chain extension effect on PBT.…”

Section: Quantification Of Morphologymentioning

confidence: 93%

“…In view of this, Aróstegui and Nazábal [14] reported that the impact energy of PBT/phenoxy (80/20 w/w) blend was improved by POE-g-MA elastomers. The presence of phenoxy, which is miscible with PBT, did not affect the toughening efficiency of POE-g-MA and the blends showed higher elastic stiffness when compared to PBT/POE-g-MA blends without phenoxy.…”

Section: Introductionmentioning

confidence: 99%

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On Toughness and Stiffness of Poly(butylene terephthalate) with Epoxide‐Containing Elastomer by Reactive Extrusion

Dasari

et al. 2004

Macro Materials & Eng

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Summary: To obtain a balance between toughness (as measured by notched impact strength) and elastic stiffness of poly(butylene terephthalate) (PBT), a small amount of tetra‐functional epoxy monomer was incorporated into PBT/[ethylene/methyl acrylate/glycidyl methacrylate terpolymer (E‐MA‐GMA)] blends during the reactive extrusion process. The effectiveness of toughening by E‐MA‐GMA and the effect of the epoxy monomer were investigated. It was found that E‐MA‐GMA was finely dispersed in PBT matrix, whose toughness was significantly enhanced, but the stiffness decreased linearly, with increasing E‐MA‐GMA content. Addition of 0.2 phr epoxy monomer was noted to further improve the dispersion of E‐MA‐GMA particles by increasing the viscosity of the PBT matrix. While use of epoxy monomer had little influence on the notched impact strength of the blends, there was a distinct increase in the elastic stiffness. SEM micrographs of impact‐fracture surfaces indicated that extensive matrix shear yielding was the main impact energy dissipation mechanism in both types of blends, with or without epoxy monomer, and containing 20 wt.‐% or more elastomer.SEM micrographs of freeze‐fractured surfaces of PBT/E‐MA‐GMA blend illustrating the finer dispersion of E‐MA‐GMA in the presence of epoxy monomer.magnified imageSEM micrographs of freeze‐fractured surfaces of PBT/E‐MA‐GMA blend illustrating the finer dispersion of E‐MA‐GMA in the presence of epoxy monomer.

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“…The degree of compatibility is one of the major factors in determining the final properties, and the other controlling factors include chemical composition, morphology, molecular weight, polymer crystal structure, and processing [3,4]. A compatible polymer blend exhibits mechanical properties proportional to the ratio of the constituent of the blend, where incompatibility often leads to a material with poor mechanical properties [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Morphology and properties of PBT/SEBS and PBT/SEBS-G-MAH blends

Lu¹,

Qu²

2016

AIP Conference Proceedings

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Abstract.A series of poly (butylene terephthlate) (PBT)/ styrene-ethylene/butylene-styrene (SEBS) and PBT/ (styreneethylene/butylene-styrene)-G-(Maleic anhydride) (SEBS-G-MAH) blends were prepared by melt blending method. And the morphology, mechanical properties were studied to identify the effect of SEBS or SEBS-G-MAH weight fraction on the properties of blends. SEM show that the minor phase was hardly distinguishable in the blend of PBT/SEBS-G-MAH as the result of the improvement in dispersibility, compared with PBT/SEBS blends. These results lead to the different mechanical properties between PBT/SEBS and PBT/SEBS-G-MAH blends.

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Stiffer and super-tough poly(butylene terephthalate) based blends by modification with phenoxy and maleated poly(ethylene–octene) copolymers

Cited by 81 publications

References 34 publications

Preparation of core-shell structured polyacrylic modifiers and effects of the core-shell weight ratio on toughening of poly(butylene terephthalate)

Preparation of core-shell structured polyacrylic modifiers and effects of the core-shell weight ratio on toughening of poly(butylene terephthalate)

On Toughness and Stiffness of Poly(butylene terephthalate) with Epoxide‐Containing Elastomer by Reactive Extrusion

Morphology and properties of PBT/SEBS and PBT/SEBS-G-MAH blends

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