SYNTHESIS OF POLYBUTADIENE PARTICLES VIA EMULSION POLYMERIZATION: EFFECT OF EMULSIFIER AND INITIATOR CONTENTS ON THE REACTION KINETICS AND LATEX’S PARTICLE SIZE

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ABDOLLAHI MAHDI; YOUSEFI MOHAMMAD REZA; RANJBAR HEIDAR; REKABDAR FATEMEH

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Journal: Iranian Journal of Polymer Science and Technology Year:2013 | Volume:25 | Issue:5 (ISSUE NO. 121) Page(s): 352-364

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Title

SYNTHESIS OF POLYBUTADIENE PARTICLES VIA EMULSION POLYMERIZATION: EFFECT OF EMULSIFIER AND INITIATOR CONTENTS ON THE REACTION KINETICS AND LATEX’S PARTICLE SIZE

Author(s)

ABDOLLAHI MAHDI | YOUSEFI MOHAMMAD REZA | RANJBAR HEIDAR | REKABDAR FATEMEH | Issue Writer Certificate

Keywords

EMULSION POLYMERIZATIONQ2

POLYBUTADIENE NANOPARTICLESQ2

POLYMERIZATION KINETICSQ2

PARTICLE NUCLEATIONQ2

POLYBUTADIENEQ3

Abstract

Batch EMULSION POLYMERIZATION of butadiene was performed at 70oC in a Buchi reactor equipped with mechanical stirrer (300 rpm) in the presence of potassium persulfate (KPS), and disproportionate rosinate, potassium cation (DPR) as initiator and emulsifier, respectively. t-Dodecyl mercaptane was used as a chain transfer agent in polymerization reactions. Conversion was measured at various time intervals by gravimetry. Polymerization rate was then calculated from the slope of conversion versus time curves. Particle size and its distribution of the POLYBUTADIENE latex (PBL) were measured by dynamic light scattering (DLS) and scanning electron microscopy (SEM). Depending on the EMULSION POLYMERIZATION conditions, PBL latices were obtained with average particles’ diameter and particle size distribution in the range of 88.5-189 nm and 35-400 nm, respectively. The number of particles per unit volume of the continuous phase was calculated from the average particle size data, from which polymerization rate per particle or equally its number of growing chains per particle was evaluated. Results showed that by increasing the emulsifier concentration, the average particle size decreases while polymerization rate increases.Moreover, the number of growing chains per particle decreased slightly by increasing the emulsifier concentration. Unlike classic EMULSION POLYMERIZATION, particle size and polymerization rate were observed to be more or less independent of initiator concentration. The results obtained from investigation of the reaction trend showed that kinetics of the EMULSION POLYMERIZATION of butadiene follows case 1 (n-<<0.5) of the Smith-Ewart kinetics. The observed behaviour was attributed to the lower efficiency of initiator in the PARTICLE NUCLEATION and growth processes.

Cites

ANTIMICROBIAL EFFECTS OF LAVANDULA ANGUSTIFOLIA MILL, ARTEMISIA SIEBERI BESSER, CINNAMOMUM VERUM J. PRESL AND MYRTUS COMMUNIS L. ENCAPSULATED ESSENTIAL OILS AGAINST PREVALENT MICROORGANISMS CAUSING SINUSITIS

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APA: Copy

ABDOLLAHI, MAHDI, YOUSEFI, MOHAMMAD REZA, RANJBAR, HEIDAR, & REKABDAR, FATEMEH. (2013). SYNTHESIS OF POLYBUTADIENE PARTICLES VIA EMULSION POLYMERIZATION: EFFECT OF EMULSIFIER AND INITIATOR CONTENTS ON THE REACTION KINETICS AND LATEX’S PARTICLE SIZE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 25(5 (ISSUE NO. 121)), 352-364. SID. https://sid.ir/paper/6468/en

Vancouver: Copy

ABDOLLAHI MAHDI, YOUSEFI MOHAMMAD REZA, RANJBAR HEIDAR, REKABDAR FATEMEH. SYNTHESIS OF POLYBUTADIENE PARTICLES VIA EMULSION POLYMERIZATION: EFFECT OF EMULSIFIER AND INITIATOR CONTENTS ON THE REACTION KINETICS AND LATEX’S PARTICLE SIZE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2013;25(5 (ISSUE NO. 121)):352-364. Available from: https://sid.ir/paper/6468/en

IEEE: Copy

MAHDI ABDOLLAHI, MOHAMMAD REZA YOUSEFI, HEIDAR RANJBAR, and FATEMEH REKABDAR, “SYNTHESIS OF POLYBUTADIENE PARTICLES VIA EMULSION POLYMERIZATION: EFFECT OF EMULSIFIER AND INITIATOR CONTENTS ON THE REACTION KINETICS AND LATEX’S PARTICLE SIZE,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 25, no. 5 (ISSUE NO. 121), pp. 352–364, 2013, [Online]. Available: https://sid.ir/paper/6468/en

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