Interaction energies for blends based on glycidyl methacrylate copolymers

Gan, P. P.; Paul, Donald R

doi:10.1016/0032-3861(94)90917-2

Cited by 39 publications

(33 citation statements)

References 47 publications

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“…As result all SAN 31 contents have shown the average particle size in the nanoscale range. Gan and Paul [34] has predicted phase separation for SAN/MGE blends at temperatures above 185°C, when SAN has 32.3 wt% of AN and MGE has between 8 and 14 wt% of GMA. Therefore it could be expected that MGE 1, containing 10 wt% of GMA, would be immiscible with SAN 31 at temperatures above 185°C.…”

Section: Resultsmentioning

confidence: 99%

PMMA/SAN and SAN/PBT nanoblends obtained by blending extrusion using thermodynamics and microrheology basis

Costa¹,

Neto²,

Hage³

2014

Express Polym. Lett.

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Abstract. Styrene-Acrylonitrile (SAN) copolymer has been blended to poly(methyl methacrylate) (PMMA) and to poly(butylene terephthalate) (PBT) to obtain polymer nanoblends based on thermodynamics and microrheological aspects. PMMA/SAN and SAN/PBT blends show miscibility windows for a specific range of acrylonitrile (AN) content in the SAN copolymer. The phase diagram for both blends has been calculated using the interaction energy density parameter B as function of AN content in the SAN. A critical interaction energy density parameter, B crit , was also calculated to find the miscibility window for both SAN blends. For some of the used SAN in the blends it was possible to obtain nanoblends as the AN content would allow B values close to the B crit . For immiscible PMMA/SAN and SAN/PBT blends the disperse particle size was predicted using suitable equations and it was observed by transmission electron microscopy (TEM). Acrylic copolymers were used as compatibilizer to modify the interfacial tension and reduce the disperse phase dimensions. The compatibilizer has shown strong effect by reducing the interfacial tension and by preventing the coalescence effect. The compatibilized blends have shown disperse particle size within the nanoscale.

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Section: Resultsmentioning

confidence: 99%

PMMA/SAN and SAN/PBT nanoblends obtained by blending extrusion using thermodynamics and microrheology basis

Costa¹,

Neto²,

Hage³

2014

Express Polym. Lett.

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“…The MGE terpolymer used as compatibilizer for the PBT/ABS blends was synthesized by bulk copolymerization using the following composition: methyl methacrylate (MMA) (88 wt%), glycidyl methacrylate (GMA) (10 wt%) and ethyl acrylate (EA) (2 wt%) 27,28 . EA was used mainly to enhance the thermal stability and prevent unzipping degradation to the final copolymer during melt mixing.…”

Section: Methodsmentioning

confidence: 99%

The effect of extrusion conditions and the use of a compatibilizer in the crystallization of PBT/ABS blends

et al. 2013

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Poly(butylene terephthalate) (PBT)/ acrylonitrile-butadiene-styrene (ABS) terpolymer blends were prepared in a twin screw extruder and the use of methyl methacrylate-glycidyl methacrylate-ethyl acrylate (MGE) terpolymer as compatibilization additive was evaluated. The effect of different screw profiles and mixing conditions were evaluated on the crystallization of the blends. Differential scanning calorimetry (DSC) was used to evaluate melting and crystallization behaviors of the PBT/ABS blends. The binary PBT/ABS blend has shown a double melting peak when cooled at lower cooling rates, mainly due to its melt-recrystallization during the heating up step. ABS has not affected the melting characteristics of neat PBT. The presence of MGE, as a reactive compatibilizer, in the PBT/ABS blends has reduced its heat of fusion and has partially inhibited its melt-recrystallization under heating. As result, it has prevented the occurrence of double melting peak. The epoxy functional groups of the MGE may react in situ to the carbonyls and hydroxyls end groups of the PBT molecules, thereby hindering the mobility of PBT molecules during the crystallization process due to its grafting to the compatibilizer molecules. The melt mixed blends prepared at lower feeding rate have shown a higher degree of crystallinity for the PBT/ABS blend, probably due to degradation of PBT caused by longer residence time in the extruder. The highest shear stress imposed to the blends at higher screw speed increased the degree of crystallinity of PBT, also due to its degradation.

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“…An efficient reactive precursor is the copolymer MGE (methyl methacrylate-glycidyl methacrylate-ethyl acrylate copoly mer), which is a copolymer of methyl methacrylate (MMA)-glycidyl methacrylate (GMA)-ethyl acrylate (EA). The MGE copolymer is miscible with the SAN phase of ABS [108], its synthesis is relatively simple [108], and only small quantities (about 5 wt %) are necessary for blend compatibilization. Since SAN is the continuous phase in ABS, in a PBT/ABS blend most of the MGE dissolved in SAN is in contact with the PBT phase.…”

Section: Polybutadiene Terephthalate Blendsmentioning

confidence: 99%