الفهرس 
GENERAL INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
To attain the finest optical performance of ink and prolonged shelf life time, dispersants have a great influence that should be attended to, so forth, the dispersants polymers sought for the current research work were prepared by following routes:
1-Reaction of different types of polyether with petrochemical based polyurethane prepolymer.
2- Reaction of same polyethers with prepared green based polyurethane prepolymer based on polyol castor oil.
Chapter 1:
General introduction, history, types of inkjet printing technology, different types of inkjet ink and the compositions of inks were presented.
Chapter 2:
Chapter 2 includes:
Introduction to petrochemical based polymeric dispersants, the established formulations and the product optical characterization.
Preparation of eight dispersants denoted PuD1 to PuD 8 by reaction of different polyethers with polyurethane prepolymer at 80-90oC in presence of Dibutyltin dilaurate DBTDL as a catalyst.
The chemical used and the prepared polymers were characterized structurally using Fourier Transform Infrared (FT-IR) spectroscopy and the polymer molecular weight parameters were probed using Gel permeation chromatography (GPC).
XII
Application of the prepared dispersants as for the ink formulation through milling using glass beads by Red Devil shaker. The usually abundant pigments namely; cyan 15:4 and pigment red 146 employed and the final ready to use ink samples were then applied to PVC substrate using hand coater.
The prepared ink and its film on the substrate were characterized to denote:
1- Ink particle size distribution
2- Ink apparent Viscosity
3- Ink adhesion test to substrate
4- Gloss test of ink prints
To compare the effectiveness of the devised dispersants the characterization results were compared to blank ink samples formulated for validation.
Chapter 3
The chapter presents general introduction about green chemistry, vegetable oil polyols, their use in polyurethane polymer and the preparation methods adopted of green polyurethane prepolymer in addition to the planned scheme of the polymeric dispersant samples.
Dispersant samples referred to as PuD9 to PuD 13 were prepared by reaction of different polyether with castor oil based polyurethane prepolymer at 80-90oC in presence of DBTDL as a catalyst and characterized as referred to in chapter 2.
Chapter 4
The chapter describes overall results, assumptions and the pathway to be adopted for the application of green chemistry concept to the chemistry used widely in the printing field.