NDLI: Hyperbranched polyester as a crosslinker in polyurethane formation: real-time monitoring using in situ FTIR

Content Provider	Springer Nature Link
Author	Dhevi, D. Manjula Anand Prabu, A. Kim, Kap Jin
Copyright Year	2016
Abstract	Hyperbranched polymers find applications in many fields such as biomedical, catalysis, commercial coatings, etc., owing to their many advantages such as ease of synthesis, more number of end functional groups, and low solution/melt viscosity. In our study, a previously unreported synthesis of A2 + AB2 type hyperbranched polyester (HBP) of three different generations (HBP-G1 to HBP-G3) using phenyl dichlorophosphate as a core and 2,2-dimethylol propionic acid as a monomer was carried out, and characterized using spectral, physical and thermal analyses. In situ FTIR was used to study the one-shot curing reaction between hexamethylene diisocyanate, polyethylene glycol and HBP-G3 at 60 °C for two different NCO/OH ratios (1.2316 and 2.1042). Lower NCO/OH ratio (1.2316) was found to obey the second order, thereby indicating the occurrence of primary reaction between –OH and –NCO groups, whereas higher NCO/OH ratio (2.1042) follows third order due to auto-catalytic effect of urethane resulting from its reaction with excess isocyanate group. Non-isothermal curing kinetics of PU formation using in situ FTIR was accomplished to determine the percentage of urethane content formed using Factor Analysis program for the first time. Based on the above data, further curing kinetics studies were carried out at three different isothermal (70, 90, and 110 °C) temperatures for lower NCO/OH ratio sample to extract its thermodynamic parameters.
Starting Page	2867
Ending Page	2888
Page Count	22
File Format	PDF
ISSN	01700839
Journal	Polymer Bulletin
Volume Number	73
Issue Number	10
e-ISSN	14362449
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-02-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hyperbranched polymers In situ FTIR Curing kinetics Polyurethanes Thermodynamic parameters Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Hyperbranched waterborne polyurethanes

Synthesis and properties of UV-curable hyperbranched polyurethane acrylate oligomers containing photoinitiator

Hyperbranched polyurethane/Fe3O4 thermosetting nanocomposites as shape memory materials

Kinetics of UV-curing of waterborne polyurethane acrylate dendrimer

Isothermal crystallization kinetics of AB3 hyperbranched polymer (HBP)/polypropylene (PP) blends

Non-isothermal crystallization kinetics and nucleation activity of hyperbranched polyester (HBPET) in recycled PET

One shot kinetic studies of hyperbranched polyester as a crosslinker in polyurethane formation by in-situ FTIR

Cure behavior and enhanced thermal properties of benzoxazine thermosets with isocyanate-terminated hyperbranched polyurethane of different degree of branching

Modification of hyperbranched epoxy by vegetable oil-based highly branched polyester resin

Hyperbranched polyester as a crosslinker in polyurethane formation: real-time monitoring using in situ FTIR

Similar Documents

Hyperbranched waterborne polyurethanes

Synthesis and properties of UV-curable hyperbranched polyurethane acrylate oligomers containing photoinitiator

Hyperbranched polyurethane/Fe3O4 thermosetting nanocomposites as shape memory materials

Kinetics of UV-curing of waterborne polyurethane acrylate dendrimer

Isothermal crystallization kinetics of AB3 hyperbranched polymer (HBP)/polypropylene (PP) blends

Non-isothermal crystallization kinetics and nucleation activity of hyperbranched polyester (HBPET) in recycled PET

One shot kinetic studies of hyperbranched polyester as a crosslinker in polyurethane formation by in-situ FTIR

Cure behavior and enhanced thermal properties of benzoxazine thermosets with isocyanate-terminated hyperbranched polyurethane of different degree of branching

Modification of hyperbranched epoxy by vegetable oil-based highly branched polyester resin

Hyperbranched polyester as a crosslinker in polyurethane formation: real-time monitoring using in situ FTIR