Interfacial polycondensation—Modeling of kinetics and film properties

Dhumal, Sunil S.; Wagh, Shrikant J.; Suresh, Akkihebbal K.

doi:10.1016/j.memsci.2008.09.002

Cited by 65 publications

(48 citation statements)

References 29 publications

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“…The kinetics model of PPTA polycondensation in this work was based on that of Sunil et al which had been successfully applied in the interfacial polycondensation field. 33 In this work, the model has been extended to a continuous flow process in a microstructured chemical system. The monomers and oligomers in the system are classified into three categories by different end groups: "A" for those having amine groups at both ends, "B" for those having acyl chloride groups at both ends and "C" for those having an amine group at one end and an acyl chloride group at the other end.…”

Section: Apparent Kinetics Of Ppd/tpc Polycondensationmentioning

confidence: 99%

Preparation of poly(p-phenylene terephthalamide) in a microstructured chemical system

Wang

Zhang

et al. 2015

RSC Adv.

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A microstructured chemical system, mainly including a micro-sieve mixer, a delay loop and a stirring tank, was designed to implement the polycondensation of p-phenylenediamine (PPD) and terephthaloyl chloride (TPC) for the preparation of poly(p-phenylene terephthalamide) (PPTA). A two-step method was exhibited, which consisted of fast conversion of more than 90% reactive groups in the delay loop and further chain growth in the stirring tank. This new polycondensation method had several advantages, such as continuous operation at higher temperature and out of pyridine, which made the process more controllable and environmentally friendly. PPTA particles with weight-average molecular weight (MW) from 4,000 to 16,000 were obtained at different synthesis conditions, and their structures were characterized by XRD, POM, IR, EA and SEM. The apparent reaction kinetics in the delay loop was also studied, which showed that the apparent activation energy was 12 kJ/mol with a pre-exponential factor of 5.4×10 3 L/(mol·s).

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Section: Apparent Kinetics Of Ppd/tpc Polycondensationmentioning

confidence: 99%

Preparation of poly(p-phenylene terephthalamide) in a microstructured chemical system

Wang

Zhang

et al. 2015

RSC Adv.

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“…Kinetics study Babak et al (2008) Polythiourea: TDITC, OPD Hashemi and Zandi (2001), Jabbari (2001aJabbari ( , 2001b, Yadav et al (1996), Dhumal et al (2008) Energy storage/heat transfer, thermal regulation, clinics, carbonless paper, perfume and laundry Karode et al (1997), Cho et al (2002), Argillier et al (2003), Zhang et al (2003), Zou et al (2004), Seehafer and Stahler (2005), Su et al (2006Su et al ( , 2007, Kwon and Kim (2006), Berezkin and Khokhlov (2006) Bioremediation of atrazine Wyss et al (2004Wyss et al ( , 2006 HSA/TPC, AC/POPA Empty 10-40, 96-249…”

Section: -Severalmentioning

confidence: 99%

Characterisation and applications of microcapsules obtained by interfacial polycondensation

Zhang

Rochefort

2012

Journal of Microencapsulation

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This review highlights the materials, mechanisms and applications of microencapsulation by interfacial polycondensation in different areas. This technology entraps active ingredients inside microcapsules/microspheres, having an average diameter ranging from nanosize to several 100 µ. Polycondensation reactions take place at the boundary of two phases to form the shells of microcapsules or matrix microspheres. The emulsion can be classified into three types: water-in-oil, oil-in-water and oil-in-oil. According to the hydrophilic-lipophilic property of core phase, different active substances, such as proteins, enzymes, insecticides, herbicides, vitamins, catalysts, drugs, essential oils, dyes and phase change materials, have been successfully incorporated into different microcapsules/microspheres. Based on the shell-forming materials, this technology is capable of preparing polyamine, polyurea, polyurethane, polythiourea, polyester, polyepoxide, polyacrylamide and polysiloxane microcapsules. Over the past two decades, microcapsules prepared by interfacial polycondensation have been widely used in carbonless paper, cosmetics, pharmacy, agriculture, energy storage/transfer, thermal insulation/regulation and information and magnetic recording.

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“…Condensed polymer walls form instantaneously at the interface of the emulsion droplets. Considering, the different physicochemical rate and equilibrium processes of this capsule (Dhumala et al, 2008) are (i) ionic equilibria for the aqueous phase monomer, (ii) transport of the aqueous phase monomer and/or the organic phase monomer from bulk phases to the site of reaction, (iii) the reaction between the two monomers, and finally and (iv) the phase separation of the formed oligomeric species.…”

Section: Interfacial Polycondensationmentioning

confidence: 99%

Development of Neem Capsule via Biopolymer and Natural Rubber for Its Controlled Release

Riyajan¹

2011

Pesticides in the Modern World - Pesticides Use and Management

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Interfacial polycondensation—Modeling of kinetics and film properties

Cited by 65 publications

References 29 publications

Preparation of poly(p-phenylene terephthalamide) in a microstructured chemical system

Preparation of poly(p-phenylene terephthalamide) in a microstructured chemical system

Characterisation and applications of microcapsules obtained by interfacial polycondensation

Development of Neem Capsule via Biopolymer and Natural Rubber for Its Controlled Release

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