On the Influence of the Initial Stages of Styrene Copolymerization with Polybutadiene on High Impact Polystyrene Morphology

Yenalyev, V. D.; Noskova, N. A.; Melnichenko, V. I.; Bovkunenko, O. P.; Bulatova, V. M.

doi:10.1007/978-1-4684-4358-5_5

Cited by 1 publication

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References 8 publications

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“…In a previous work (Díaz de León et al 2004), it was demonstrated by our group that the appropriate amount of CTA could increase and modify the morphology of the elastomeric phase due to lower Mn of the matrix and the grafted PS. As the molecular weight of the PS matrix decreases, an increase in the viscosity ratio between the disperse and continuous phases (η d /η c ) can be promoted (Baer 1972) as well as a greater migration of low molecular weight PS chains from the PS/St phase toward the PB/St phase, leading to an increase in particle size by occlusions growth (Yenalyev et al 1983). In addition, a decrease in Mn of grafted PS causes a greater interfacial tension.…”

Section: Effect Of the Strategy Employed During The Hips Synthesis Onmentioning

confidence: 99%

Synthesis strategies in the preparation of high impact polystyrene with different type of particles as the dispersed phase, towards a balance between impact strength and gloss

Enríquez-Medrano¹,

Acuña²,

Morales³

2020

Braz. J. Chem. Eng.

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Three different synthesis strategies based on the in situ pre-polymerization process were employed in order to obtain High Impact Polystyrene (HIPS) with different type (morphology and size) of particles as the dispersed phase, achieved by the use of two styrene-butadiene rubbers (SBR) in the initial recipes. The rubbers used were tapered polystyrene/polybutadiene copolymers with a polystyrene/polybutadiene composition of 10/90 and 40/60 wt%. Results were discussed in terms of physical-chemical, morphological, mechanical and optical parameters. A combination of two or three types of particle morphologies, i.e. salami, core-shell and droplets in the same sample were evidenced by Transmission Electron Microscopy analysis, independently of the strategy employed. The grafting degree, volume fraction of the dispersed phase and impact strength were positively affected by the increase of the amount of 10/90 SBR in the recipe. Several HIPS samples showed a good balance between impact strength and gloss, particularly those obtained from the strategy herein named as melt blending.

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Section: Effect Of the Strategy Employed During The Hips Synthesis Onmentioning

confidence: 99%

Synthesis strategies in the preparation of high impact polystyrene with different type of particles as the dispersed phase, towards a balance between impact strength and gloss

Enríquez-Medrano¹,

Acuña²,

Morales³

2020

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

On the Influence of the Initial Stages of Styrene Copolymerization with Polybutadiene on High Impact Polystyrene Morphology

Cited by 1 publication

References 8 publications

Synthesis strategies in the preparation of high impact polystyrene with different type of particles as the dispersed phase, towards a balance between impact strength and gloss

Synthesis strategies in the preparation of high impact polystyrene with different type of particles as the dispersed phase, towards a balance between impact strength and gloss

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