Encapsulation of Solid Particles by the Concentrated Emulsion Polymerization Method *

2019 ◽  
pp. 139-146
Author(s):  
Jun Seo Park ◽  
Eli Ruckenstein
2021 ◽  
Vol 1028 ◽  
pp. 263-268
Author(s):  
Rafly Aprilian ◽  
Mas Ayu Elita Hafizah ◽  
Azwar Manaf ◽  
Andreas

Synthesis of Polyvinyl Acetate (PVAc) through the conversion of Vinyl Acetate Monomer (VAM) was carried out by emulsion polymerization method assisted by thermal initiator Ammonium persulfate (APS) under reaction temperature was kept at 70 °C – 80 °C with 5 hours of reaction time and agitation speed at 300 rpm. The polymerization reaction was running used batch process technique where is all components were mixed all together simultaneously. A set of polymerization reactions was conducted when the absence of surfactant and cationic and amphoteric surfactant presence. The monomer chain's double bond was found at 1645 cm-1 was measured by FTIR Spectrophotometer did not disappear after polymerization reaction was utterly done. The spectrum FTIR of Polyvinyl acetate did not explicitly found at 1644 cm-1. During the reaction, characterization was conducted by measuring the solid content value where the maximum solid content was achieved was 6,1 % when using Amphoteric surfactant while the lowest solid content was obtained when the absence of surfactant. Other parameters were conducted to observe the acidity value by pH Meter.


Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 774 ◽  
Author(s):  
Wendy Rusli ◽  
Alexander Jackson ◽  
Alexander van Herk

Vesicle templated emulsion polymerization is a special form of emulsion polymerization where the polymer is grown from the outside of the vesicle, leading to nanocapsules. Cost effective nanocapsules synthesis is in high demand due to phasing out of older methods for capsule synthesis. Although the first indications of this route being successful were published some 10 years ago, until now a thorough understanding of the parameters controlling the morphologies resulting from the template emulsion polymerization was lacking. Most often a mixture of different morphologies was obtained, ranging from solid particles to pro-trusion structures to nanocapsules. A high yield of nanocapsules was not achieved until now. In this paper, the influence of initial vesicle dispersion, choice of the Reversible Addition-Fragmentation chain Transfer (RAFT) species and oligomer, monomer and crosslinker have been investigated. It turns out that good initial vesicle dispersion, molecular control of the RAFT process, a not too hydrophobic monomer and some crosslinking is needed to result in high yield of nanocapsules. In previous work, the level of RAFT control was often suboptimal and not properly verified and although nanocapsules were shown, other morphologies were also present. We now believe we have a full understanding of vesicle templated nanocapsules synthesis, relevant to many applications.


2018 ◽  
Vol 6 (41) ◽  
pp. 20473-20479 ◽  
Author(s):  
Peng Jin ◽  
Wenlong Tan ◽  
Jia Huo ◽  
Tingting Liu ◽  
Yu Liang ◽  
...  

In this work, we develop a general strategy for the preparation of robust hierarchically porous and readily processable MOF composites through an interfacial nanoassembly/emulsion polymerization method.


2014 ◽  
Vol 5 (10) ◽  
pp. 3363-3371 ◽  
Author(s):  
Yunlong Guo ◽  
Jianhua Zhang ◽  
Peile Xie ◽  
Xiang Gao ◽  
Yingwu Luo

A many-shot RAFT emulsion polymerization method to synthesize gradient copolymers with high molecular weight and a tailor-made compositional gradient.


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