Microencapsulation via In Situ Polymerization

In situ polymerization is a very developed and commercialized chemical process for microencapsulation.1-4 In this process the reactants, either monomers or oligomer, are in a single phase. The polymerization occurs in the continuous phase in most cases, or in the dispersed phase, for example, in sit...

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Bibliographic Details
Published inHandbook of Encapsulation and Controlled Release pp. 331 - 338
Format Book Chapter
LanguageEnglish
Published CRC Press 2016
Subjects
Resin Prepolymer
Styrene Maleic Anhydride
Color Precursor
Butyl Glycidyl Ether
FORMALDEHYDE SCAVENGER
Residual Formaldehyde
Sodium Dodecyl Benzene Sulfonate
Dispersed Phase
Amino Resin
Polyacrylic Acid
Oil Droplet
Expandable Graphite
Microcapsule Preparation
Carbonless Paper
Self-healing Agent
Suspension Polymerization
Methylene Bridge
NHR
H O2
PCM
Situ Polymerization
Methylene Bridge Formation
Emulsion Polymerization
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Summary:In situ polymerization is a very developed and commercialized chemical process for microencapsulation.1-4 In this process the reactants, either monomers or oligomer, are in a single phase. The polymerization occurs in the continuous phase in most cases, or in the dispersed phase, for example, in situ water-in-oil microencapsulation.5-7 The formed polymer migrates and deposits on the dispersed phase to generate a solid wall thus forming a microcapsule. In a wide sense, emulsion polymerization, suspension polymerization, and some other processes fall into this category.8 This chapter is only focused on in situ microencapsulation based on amino resins, especially melamineformaldehyde (MF) and urea-formaldehyde (UF) systems.
DOI:10.1201/b19038-23