Reactive compatibilization of polyamide-6 (PA 6)/polybutylene terephthalate (PBT) blends by a multifunctional epoxy resin

Chiou, Kuo‐Chan; Chang, Feng‐Chih

doi:10.1002/(sici)1099-0488(20000101)38:1<23::aid-polb3>3.3.co;2-p

Cited by 31 publications

(51 citation statements)

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“…Previously, tetra-functional epoxy monomer was successfully used to compatibilize PBT/nylon 6, PBT/maleated poly(propylene) (PP-g-MA) and PET/polyphenylene ether blends. [19][20][21] It was also reported that the monomer reacted with PBT and PP-g-MA simultaneously to form PBT-co-epoxy-co-PP-g-MA copolymers at the interface that were able to anchor along the interface and served as efficient compatibilizers. [20] The positive role of the monomer in the dispersion of E-MA-GMA particles can be better explained by considering its effect on the viscosity of PBT/E-MA-GMA blend.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 3 clearly shows that 0.2 phr of epoxy monomer increases PBT melt viscosity, which is due to the chain extension effect of the monomer on PBT. [19,20] Higher matrix viscosity in turn favors a finer dispersion of E-MA-GMA elastomer with a concomitant increase of the viscosity of PBT/E-MA-GMA blend. It is expected that the adhesion between PBT and E-MA-GMA will be enhanced by the coupling reaction of the monomer at the PBT/E-MA-GMA interface, which also increases the blend viscosity.…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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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“…The highest reactivity was observed when 2,2 0 -(2,6-pyridylene)bis(2-oxazoline) was used as coupling agent. In another example, a multifunctional epoxy resin was used as compatibilizer for PA6/PBT blends [19].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional coupling agents. Part 4: Block copolymers based on amino terminated polyamide-12 and carboxy terminated poly(butylene terephthalate)

Böhme

Jakisch

Komber

et al. 2007

Polymer Degradation and Stability

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“…It might be ascribed to the occurrences of initial melting, recrystallization, and remelting processes in the melting region [17] . It has been reported that PBT could have two kinds of spherulites depending on the cooling and processing conditions [18] . As shown, no crystallization exotherm was observed despite of the rapid cooling in the injection mold.…”

Section: Molecular Movementmentioning

confidence: 99%

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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Reactive compatibilization of polyamide-6 (PA 6)/polybutylene terephthalate (PBT) blends by a multifunctional epoxy resin

Cited by 31 publications

References 0 publications

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

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

Multifunctional coupling agents. Part 4: Block copolymers based on amino terminated polyamide-12 and carboxy terminated poly(butylene terephthalate)

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

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