Dissertation > Excellent graduate degree dissertation topics show

Synthesis and Characterization of Polyurethane Dispersion Based on Polycarbonate Diols or Diaminocarboxylate

Author: LiJieFeng
Tutor: SunDongCheng
School: South China University of Technology
Course: Applied Chemistry
Keywords: polyurethane dispersions high performance polycarbonate diols diamino- carboxylate
CLC: TQ323.8
Type: Master's thesis
Year: 2011
Downloads: 42
Quote: 0
Read: Download Dissertation

Abstract


At present, the polyurethane using by textile coating and textile printing don’t have good mechanical properties, wearable, waterproof, breathable, and that feel hard, poor fastness, easy to pollute the environment in China. To improve the performance of polyurethane, this article presents the preparation method of PUD having a high-performance and high solid content of 50% by using the acetone method. The PUD was synthesized using special polyol poly （1,6-hexanediol） carbonate diols （PCDL） with poly tetrahydrofuran （PTMG） as soft segments, isophorone diisocyanate （IPDI） as hard segment, and had done basic research about its performance. The effect of different parameters on dispersions’viscosity, particle size, particle size distribution and particle morphology were investigated by laser light scattering particle size analyzer and Transmission Electron Microscope （TEM）. The results showed that the particle size decreased and the viscosity increased with the increasing of hydrophilic group content （HGC）, but the particle size increased and the viscosity decreased with the decreasing of PCDL content and the increasing of NCO/OH. Particle size distributions became narrower with increasing of HGC, but became wider with decreasing of PCDL content and increasing of NCO/OH. TEM showed that PUD particles were inerratic sphericity with more hydrophile, the particles became larger and the anomaly particles increased with decreasing of HGC. PUD Films were tested by mechanical property, shore A hardness, Dynamic mechanical thermal analysis （DMA） and thermogravimetry analysis （TGA）. The results of tensile tests showed that PUD film has excellent mechanical properties, the max ultimate elongation of PUD cast film was 1700% and the max elongation strength was 40MPa. Dynamic mechanical analysis showed that the glass transition temperatures（Tg） of PUD cast films were decreased with the decreasing of PCDL content, but increased with the increasing of -NCO/-OH. Thermogravimetric analysis indicated that the degradation of PUD cast film started at about 300℃and completely degradation at about 500℃that showed excellent thermal stability.Hydrophilic monomer using by PUD just stay in the point of DMPA mostly. The development and production of the emulsifier of good performance also can not keep up with market changes and demands. DMPA has high melting point, poor fat-soluble. The Extent of reaction is low and the dosage is large when direct use DMPA,it will impact the water resistance of PUD film. A new type of hydrophilic monomer N-（2-aminoethyl）-aminopropionate sodium （AAA-Na） was synthesized by the Michael addition reaction using ethylene diamine and methyl acrylate as raw materials. Polyurethane dispersions（PUDs） with solid content above 40% were synthesized using N-（2-aminoethyl）-aminopropionate sodium（AAA-Na） as a hydrophilic monomer, poly（1,4- butanediol adipate） （PBA）, isophorone diisocyanate （IPDI）, ethylene diamine （EDA） and diethanolamine （DEA） by the acetone process.This new type of hydrophilic monomer N-（2-aminoethyl）-amino-propionate （AAA-Na） was investigated by infrared spectroscopy. The results showed that there exist the symmetric stretching vibration and asymmetric stretching vibration absorption peak of carboxylate ions（-COO-） in the 1455 cm-1 and 1670 1569 cm-1, and the structure of synthetic product meet to the structure of hydrophilic monomer AAA-Na as expected. Detection and analysis through a variety of means showed that the Characterization of PUD based on AAA-Na are basically consistent with the Characterization of PUD based on PCDL.

Related Dissertations

  1. Development of Pxibus High Performance Digital I/O Module,TP274
  2. Synthesis and Resolution Property of N-(9-Fluorenylmethoxycarbonyl)-D-Tryptophan and D-Phenylalanine Imprinted Polymer,O631.3
  3. Research on Melamineanalysis Method in Milk Powder and Establish the System of Rapid Determination,O657.3
  4. Fast Determination Method Research of Bisphenol A in Food Packing Material,TS206.4
  5. Analysing Sequence Characters of ADSL and PurH Gene and Correlation between Genes Expression and IMP Content in Duck,S834
  6. Study on Synthesis of Polysaccharide Tris (Phenylcarbamates) Derivatives as Chiral Stationary Phases (CSPs) and Estimation of Their Resolution Abilities,TQ460.1
  7. Synthesis and Quality Control Research of ATPR,TQ463
  8. Study on Synthetic of BINOL, Amino Acid and Derivatives Molecularly Imprinted Polymers and Their Application in the Chiral Resolution,O631.3
  9. Optimization of Extraction of Gastrodin from Rhizoma Gastrodia by Response Surface Methodology,R284.1
  10. Research on Multicast for IPTV Services in 3Tnet,TP393.09
  11. Research of Finite Element Method on GPU,O241.82
  12. Based on GPU / CPU multi- level parallel CFD Optimization Strategy,V221
  13. HPWS, knowledge sharing, organizational learning atmosphere impact on employee performance,F272
  14. Ultra-high performance cement-based composites static mechanical properties and resistance to penetration performance of,TU528
  15. Studies on the Extraction and Purification of High Purity Mogroside V from Momordica Grosvenori,S668.9
  16. The Correlation Research between the Gene Polymorphisms of Five CYP450 Isoforms of Enzymes and the Differences of Metabolic Ratio of Cocktail Probes,R969.1
  17. Study of Exposure Level and Exposure Factors of Phthalate Esters in Pregnant Women,R714.2
  18. The Comparative Study of Two Deproteinized Methods on Xenogeneic Bone Graft Substitute Material,R687.3
  19. Chinese medicines by high performance liquid chromatographic fingerprints and non-linear chemical fingerprint of,R284
  20. Application of Dispersive Liquid-Liquid Microextraction Coupled with High Performance Liquid Chromatography in the Analysis of Pesticide Residues,TS255.7
  21. Determination of Phenolic Antioxidants in Fried Food by Hplc,TS207.3

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polycondensation resin and plastic > Polyurethane (poly carbamate ) and plastic
© 2012 www.DissertationTopic.Net  Mobile