Effect of the mixing conditions on the phase structure of PP/PS blends

Fortelný, Ivan; Michálková, Danuše; Mikešová, Jana

doi:10.1002/(sici)1097-4628(19960103)59:1<155::aid-app20>3.3.co;2-v

Cited by 20 publications

(33 citation statements)

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“…1. Similar morphology was observed in our previous studies of PP/PS blends [50–53], low‐density polyethylene (LDPE/PS) [22, 29], and ternary PS/polyamide/polyethylene, and related binary blends [54]. The reasons of this effect are discussed in more detail in Ref.…”

Section: Resultssupporting

confidence: 86%

Morphology and mechanical properties of polypropylene/polystyrene blends compatibilized with styrene–butadiene block copolymers

Fortelný

Minkova

Kotek

et al. 2011

Polymer Engineering & Sci

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The effect of molecular structure of styrene–butadiene block (SB) copolymers on the morphology, tensile properties, impact strength, and microhardness of polypropylene/polystyrene (PP/PS) (80/20) blends was studied. The addition of SB copolymers substantially reduces the size of dispersed PS particles formed at mixing. The distribution of SB copolymers between the interface and bulk phases is controlled by the length of styrene blocks in SB, but a decrease in the size of PS particles at mixing correlates with total molecular weight of SB copolymers. For a substantial part of compatibilized blends, PS particles aggregate rapidly during compression molding and form honeycomb‐like particles split by SB partitions, which persist at further annealing. Aggregation of PS particles continues slowly at further annealing. Blends containing PS particles with well‐developed honeycomb structure show lower yield stress, higher plasticity, and lower tensile impact strength than the blends having PS particles with simple or undeveloped honeycomb structure. Microhardness of PP/PS blends is additive and of PP/PS/SB blends is lower than the additive due to the effect of SB copolymers on crystalline structure of PP matrix. POLYM. ENG. SCI., 2012. © 2011 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 86%

Morphology and mechanical properties of polypropylene/polystyrene blends compatibilized with styrene–butadiene block copolymers

Fortelný

Minkova

Kotek

et al. 2011

Polymer Engineering & Sci

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“…0) depends on stress (deformation rate) in a different way than P c . While R in dilute blends mostly decreases with increasing stress applied during mixing (94,(122)(123)(124), in concentrated systems, R is a complex function of system parameters and it can be a decreasing, increasing,…”

Section: Phase Structure Development In Moltenmentioning

confidence: 99%

Polymer Blends

Horák¹,

Fortelný²,

Kolařı́k³

et al. 2005

Kirk-Othmer Encyclopedia of Chemical Technology

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where A and B are positive constants characterizing enthalpy and entropy of the interaction parameter w 12 , respectively. Its positive value indicates a very poor miscibility of high molecular weight nonpolar polymers.Relations considering the compressibility of polymer blends are based on the equations-of-state theories (5,6,(8)(9)(10)(11)(12)(13)(14)(15)(16). These relations include contributions

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“…Based on these figures, 2 872 000 tonnes of plastics, 718 000 tonnes of lead, 1363 tonnes of cadmium and 287 tonnes of mercury entered landfill during this time. In the 2002, a report from the Basel Action Network concluded that the obsolescence of 315 million computers left approximately 1.2 billion pounds of lead, 2 million pounds of cadmium, and four billion pounds of plastics in the waste stream [9,10] confirm such reports, claiming that consumer electronics are responsible for up to 40% of the lead in landfills, and about 70% of heavy metals (such as mercury and cadmium) in US landfills come from electronic waste. These toxins can cause brain damage, allergic reactions and cancer [9].…”

mentioning

confidence: 99%

“…Recycling mixed plastics residue in the form of blends is an attractive route for fabrication of value added products with desired attributes, from academic and industrial point of view, because of the improvements in the impact strength, dimensional stability and processability with respect to virgin blend [10][11][12][13]. However, blending of plastics waste has been a technical problem due to immiscible characteristics of the constituent polymers in the blend which results in inferior properties [13][14][15].…”

mentioning

confidence: 99%

Polypropylene/high impact polystyrene blend nanocomposites obtained from E-waste: evaluation of mechanical, thermal and morphological properties

Mural

Mohanty

Nayak

et al. 2011

Int J Plast Technol

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Postconsumer Polypropylene and High Impact Polystyrene were obtained from E-waste by mechanical recycling. Recycled PP/HIPS at various blend ratios of 30/70, 50/50 and 70/30 were blended in a batch mixer and was optimized at a blend composition of 70/30 wt ratio of PP/HIPS based on mechanical performance. Mechanical, morphological and thermal properties of optimized recycled blend were studied using triblock copolymer SEBS, as well as SEBS with C20A. Mechanical tests revealed that the blends prepared using 3 wt% of C20A and 5 wt% SEBS with 3% C20A exhibited an increase of 45.13% and 60.73% in impact strength respectively thus indicating interaction of SEBS and C20A with HIPS and PP. Scanning Electron Microscopy (SEM) showed that incorporation of SEBS and C20A reduced average particle size from 5.078 to 2.082 and 1.724 μm respectively. X ray diffraction patterns in the recycled blend nanocomposites showed an increase in the basal spacing indicating the formation of an intercalated structure. Thermal properties of the blend and blend nanocomposites were investigated employing DSC and TGA. Further, DMA analysis showed existence of two distinct T g s corresponding to PP and HIPS thus indicating the formation of a biphase morphology.

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Effect of the mixing conditions on the phase structure of PP/PS blends

Cited by 20 publications

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Morphology and mechanical properties of polypropylene/polystyrene blends compatibilized with styrene–butadiene block copolymers

Morphology and mechanical properties of polypropylene/polystyrene blends compatibilized with styrene–butadiene block copolymers

Polymer Blends

Polypropylene/high impact polystyrene blend nanocomposites obtained from E-waste: evaluation of mechanical, thermal and morphological properties

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