Compatibilization of polypropylene/polystyrene blends with poly(styrene-b-butadiene-b-styrene) block copolymer

Radonjič, Gregor; Musil, Vojko; Šmit, Ivan

doi:10.1002/(sici)1097-4628(19980926)69:13<2625::aid-app13>3.0.co;2-t

Cited by 70 publications

(53 citation statements)

References 26 publications

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“…SBS was investigated as a compatibilizer for PP/PS blends by some other researchers [23][24][25][26][27][28][29][30][31][32]. By selective localization at the interface of PP/PS blends, SBS is an interfacial agent that can lower the interfacial tension of the PP/PS blends; thereby producing finer and more stable morphologies.…”

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

“…SBS addition was found to compatibilize the CB-filled PP/PS blends. This observation is consistent with that of Radonjic et al [25] for unfilled PP/PS blends compatibilized with SBS.…”

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

“…A similar trend was reported by Wang et al [24] for PP/PS blends without CB. Because of the poor interfacial adhesion, the PS phase in PP matrix acts as voids and thereby reduces the load-bearing cross section [25]. Within the 100% co-continuity region, the yield stresses of the PP/PS blends are the lowest and are independent of the PP/PS volume ratio.…”

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

“…The yield stress of PP/PS blends compatibilized with SBS depends not only on the yield stress of the pure individual polymers but also on the crystallinity of the PP phase after the addition of SBS [25]. For (50/50) and (70/30) PP/PS blends, experimental results obtained by Radonjic et al [25]. demonstrated that addition of 5 wt% SBS do not have considerable influence on the crystallinity of the PP phase.…”

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

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Mechanical properties of carbon black‐filled polypropylene/polystyrene blends containing styrene‐butadiene‐styrene copolymer

Al‐Saleh

Sundararaj

2009

Polymer Engineering & Sci

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Mechanical properties and morphology of carbon black (CB)-filled polypropylene/polystyrene (PP/PS) blends with and without styrene-butadiene-styrene (SBS) triblock copolymer were studied as a function of PP/PS volume ratio and CB content. Blends were prepared by melt mixing in a batch mixer followed by compression molding. Incompatibility of the PP/PS blends was found to negatively influence the blends' tensile properties. Addition of 5 vol% SBS to the CB-filled PP/PS blends was found to compatibilize the blends by reducing the interfacial tension and enhancing the interfacial adhesion. In general, SBS addition enhanced the yield stress of the co-continuous CB-filled PP/PS blends, reduced the Young's modulus and enhanced the elongation at yield for all blends studied. For the (70/30) PP/PS blends with and without SBS, yield stress of the blends filled with up to 3 vol% CB is close to that of the unfilled (70/30) PP/PS blends. Increasing CB loading to 5 vol% considerably increased the yield stress for the blends with and without SBS. A gradual increase in Young's modulus was reported with increasing CB content in the (70/30) PP/PS blends with and without SBS. Increasing CB loading up to 5 vol% did not influence the elongation at yield of the (70/30) PP/PS blend without SBS.

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Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

“…SBS addition was found to compatibilize the CB-filled PP/PS blends. This observation is consistent with that of Radonjic et al [25] for unfilled PP/PS blends compatibilized with SBS.…”

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

Section: Influence Of Pp/ps Volume Ratio and Sbs Additionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical properties of carbon black‐filled polypropylene/polystyrene blends containing styrene‐butadiene‐styrene copolymer

Al‐Saleh

Sundararaj

2009

Polymer Engineering & Sci

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“…1,[18][19][20][21] Studies have also shown that sPS is miscible with atactic polystyrene (aPS). [22][23][24][25] Therefore, these copolymers are expected to be compatibilizers for iPP/sPS blends.…”

mentioning

confidence: 99%

Morphology, Tensile Strength and Thermal Behavior of Isotactic Polypropylene/Syndiotactic Polystyrene Blends Compatibilized by SEBS Copolymers

Chen

Tang

Li³

et al. 2004

Polym J

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ABSTRACT:The effects of three triblock copolymers of poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS) of different molecular weight (MW) on the morphology, tensile strength and thermal behavior of isotactic polypropylene/syndiotactic polystyrene (iPP/sPS, 80/20) blend are investigated. Morphology observation shows that both the medium MW and the lower MW SEBS are more effective than the higher MW SEBS in compatibilizing the blends. Tensile tests revels both the medium and low MW compatibilizer lead to a significant improvement in tensile strength, while the higher MW compatibilizer is efficient in increasing the elongation at break of the blends. The localization of compatibilizers in the blends is observed by mean of SEM and the correlation between the distribution of the compatibilizers and mechanical properties of the blends is evaluated. The mechanical properties of the iPP/sPS blends depend on not only the interfacial activity of the compatibilizers but also the distribution of the compatibilizer in the blend. Addition of the compatibilizers to the blend causes a remarkable decrease in the magnitude of the crystallization peak of sPS at its usual T c . Vicat softening points demonstrate that the heat resistance of iPP/sPS blend is much higher than that of the pure iPP.

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Compatibilization effects of styrenic/rubber block copolymers in polypropylene/polystyrene blends

Radonjič

1999

J. Appl. Polym. Sci.

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Compatibilizing effects of styrene/rubber block copolymers poly(styrene‐b‐butadiene‐b‐styrene) (SBS), poly(styrene‐b‐ethylene‐co‐propylene) (SEP), and two types of poly(styrene‐b‐ethylene‐co‐butylene‐b‐styrene) (SEBS), which differ in their molecular weights on morphology and selected mechanical properties of immiscible polypropylene/polystyrene (PP/PS) 70/30 blend were investigated. Three different concentrations of styrene/rubber block copolymers were used (2.5, 5, and 10 wt %). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to examine the phase morphology of blends. The SEM analysis revealed that the size of the dispersed particles decreases as the content of the compatibilizer increases. Reduction of the dispersed particles sizes of blends compatibilized with SEP, SBS, and low‐molecular weight SEBS agrees well with the theoretical predictions based on interaction energy densities determined by the binary interaction model of Paul and Barlow. The SEM analysis confirmed improved interfacial adhesion between matrix and dispersed phase. The TEM micrographs showed that SBS, SEP, and low‐molecular weight SEBS enveloped and joined pure PS particles into complex dispersed aggregates. Bimodal particle size distribution was observed in the case of SEP and low‐molecular weight SEBS addition. Notched impact strength (ak), elongation at yield (εy), and Young's modulus (E) were measured as a function of weight percent of different types of styrene/rubber block copolymers. The ak and εy were improved whereas E gradually decreased with increasing amount of the compatibilizer. The ak was improved significantly by the addition of SEP. It was found that the compatibilizing efficiency of block copolymer used is strongly dependent on the chemical structure of rubber block, molecular weight of block copolymer molecule, and its concentration. The SEP diblock copolymer proved to be a superior compatibilizer over SBS and SEBS triblock copolymers. Low‐molecular weight SEBS appeared to be a more efficient compatibilizer in PP/PS blend than high‐molecular weight SEBS. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 291–307, 1999

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Compatibilization of polypropylene/polystyrene blends with poly(styrene-b-butadiene-b-styrene) block copolymer

Cited by 70 publications

References 26 publications

Mechanical properties of carbon black‐filled polypropylene/polystyrene blends containing styrene‐butadiene‐styrene copolymer

Mechanical properties of carbon black‐filled polypropylene/polystyrene blends containing styrene‐butadiene‐styrene copolymer

Morphology, Tensile Strength and Thermal Behavior of Isotactic Polypropylene/Syndiotactic Polystyrene Blends Compatibilized by SEBS Copolymers

Compatibilization effects of styrenic/rubber block copolymers in polypropylene/polystyrene blends

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