Teilchenbildung bei der Herstellung von kautschukmodifiziertem Polystyrol

Echte, Adolf

doi:10.1002/apmc.1977.050580107

Cited by 74 publications

(20 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…PS crazes visibly, with well-defined craze^.^'^^ PS filled with chalk did not craze, being too brittle, while the blends PS/BR and the filled blends PS/BR/ chalk exhibited, in the concentration range of [2][3][4][5][6][7][8][9][10] vol % of BR and chalk, pronounced stress whitening due to multicrazing. The micromechanics of the filled blends PS/BR/chalk were studied using different microscopic methods and different test specimens.…”

Section: Micromechanicsmentioning

confidence: 99%

Toughened blends of polystyrene and polybutadiene filled with chalk

Braun

Klein

Hellmann

1996

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

SYNOPSISBrittle thermoplastics are hardened and embrittled by mineral fillers and softened and (sometimes) toughened by elastomers. We investigated the possibility of combining these effects favorably in filled blends of a thermoplastic, polystyrene (PS); an elastomer, polybutadiene (BR); and a filler, chalk. The success had to be measured in comparison to commercial high-impact polystyrene (HIPS) which is produced by in situ polymerization. At low concentrations of BR, simple blends of PS/BR are tougher than PS itself, but not considerably. This could be improved by adding chalk. The blends PS/BR/chalk feature a core-shell domain morphology, with BR enveloping chalk aggregates on the micrometer scale. At BR contents of less than 10 vol %, the stress-strain behavior of the filled blends PS/BR/chalk compares well to that of HIPS. The blends exhibit multicrazing with characteristic patterns and can be bent easily without breaking. At higher BR contents, however, the blends go back to brittle failure.

show abstract

Section: Micromechanicsmentioning

confidence: 99%

Toughened blends of polystyrene and polybutadiene filled with chalk

Braun

Klein

Hellmann

1996

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

show abstract

“…In phase separation induced by polymerization reaction or crosslinking reaction, several interesting patterns have been reported as well [1][2][3][4][5][6][7]. Marked examples are the concentric pattern appearing in phase separation induced by photocrosslinking of random copolymer poly(styrene-cochloromethylstyrene) in the presence of poly(vinylmethylether) [3,4], and the salami pattern appearing in high-impact polystyrene [5,6] or in radical polymerization of 2-chlorostyrene in the presence of polystyrene [7]. In this paper, we reported a unique structure formed during phase separation induced by radical polymerization of 4-chlorostyrene monomer in the presence of random copolymer poly(dimethylsiloxane-co-diphenylsiloxane).…”

mentioning

confidence: 99%

Crystal-like pattern formation in polymerization-induced phase separation

Matsushita

Furukawa²,

Okada³

2004

Phys. Rev. E

View full text Add to dashboard Cite

A unique domain structure was found in liquid-liquid phase separation induced by radical polymerization of 4-chlorostyrene monomer in the presence of random copolymer poly(dimethylsiloxane-co-diphenylsiloxane). Droplets with a narrow size distribution were generated by phase separation, and these droplets hardly coalesced by collisions. With the growth of droplet size, droplets gradually filled the space and spontaneously arranged themselves in a regular array like a crystal. The mechanism of regular array formation was discussed based on the large difference in viscoelastic properties between two segregating components.

show abstract

“…This morphology is essentially invariant after about 30 wt% of the plastic phase has been polymerized though the final polymer product contains very little residual monomers. Phase inversion has been observed with a phase contrast micro scope [183] and monitored by viscosity measurements [184]. Phase inversion does not lead to the clean separation of rubber and the plastic domains, but rather the rubber phase contains subinclusion of the plastic.…”

Section: Blends Of Polystyrene and Styrene Copolymersmentioning

confidence: 99%

“…The size is governed by the shear stress from the agitator, the viscosity ratio of the two phases, and the interfacial tension between them. Particle size decreases with increasing agitator speed [183,190,191]. The influence of the viscosity ratio with respect to drop breakup in a system of two immiscible fluids was studied by Rumscheidt and Mason [192] and Karam and Bellinger [193].…”

Section: Blends Of Polystyrene and Styrene Copolymersmentioning

confidence: 99%

Rubber–Plastic Blends: Structure–Property Relationship

Datta

2016

Encyclopedia of Polymer Blends

View full text Add to dashboard Cite

Blends of rubbers and plastics have both an extensive history and a variety of applications, since blends retain most of the stiffness of thermoplastics and impart some of the resilience and the impact toughness of rubbers. Most useful blends have morphology of rubber dispersed in the thermoplastic matrix since the reverse does not lead to same degree of utility. The properties of these blends depend on the relative ratio of the rubber and the plastic and, more importantly, on the morphology of the dispersion. A very large research effort has been made in an attempt to control and determine the morphology and the interface of the rubber and the plastic as well as understand the effect of the rubber dispersion on the properties of the blend. Blends are important commercially since they allow the development of unique properties from the same constituents with small changes in the relative amounts or the dispersion. The conventional prac tice of blend formation is the melt mixing of the components although, in some cases, a polymerization process that enables the direct production of the binary blend is possible. These direct production processes are efficient since they pro duce the desired morphology and the required polymers in a single step. Blends have become extremely important for the development of polyolefin rubbers and plastics since a large variety can be mixed in a wide composition ratio to produce novel properties. These blends are easily made and have stable dispersion during processing due to only small thermodynamic differences between the various polyolefins compared with engineering thermoplastics. This chapter describes the physics and the chemistry and more importantly the relationship between the structure of the blend and its properties. This area has been continually progressed [1] and reviewed [2]. Progress arises from new materials and new technologies for making rubber-plastic blends. The area of polyethylene blends cited above is an important development. The Encyclopedia of Polymer Blends: Volume 3: Structure, First Edition. Edited by Avraam I. Isayev.

show abstract

Teilchenbildung bei der Herstellung von kautschukmodifiziertem Polystyrol

Cited by 74 publications

References 31 publications

Toughened blends of polystyrene and polybutadiene filled with chalk

Toughened blends of polystyrene and polybutadiene filled with chalk

Crystal-like pattern formation in polymerization-induced phase separation

Rubber–Plastic Blends: Structure–Property Relationship

Contact Info

Product

Resources

About