sowonmoon+log

sowon moon log

I want to do my research about synthesis and Characterization of nylon

hexamethylenediamine


 * [Sure you can do synthesis and characterization of Nylon - you could discuss how properties change when using different diamines. JCB]**

hexamethylenediamine
 * chemical :**

density 0.848 g/cm3[| Iowa State University Chem Department] 0.799 g/cm3 [|Pubchem] 0.83 g/cm3 [|MSDS] 0.840 g/cm3 [|Alfa Aesar] 0.89 g/cm3 [|WolframAlpha]

melting point 39'c-42'c mean value 40.5'c [|Knovel] 42'c 315K [|Pubchem] 41'c[| Inchem] 311.6K[| Journal of chemical and engineering data] 39'c [|MSDS]

boiling point 197'c [|hbcpnetbase] 205'c 478K [|Pubchem] 204-205'c [|sigma aldrich] 204'c [|OSHA] 195-196'c mean value 195.5'c [|springerlink]->journal of russian bulletin Flash point 80'c [|fishersci] 81'c [|OSHA] 93'c [|MSDS] 85'c [|Alfa Aesar] 93.89'c [|WolframAlpha]

Enthanpy of vaporization 44.13 kJ/mol [|chemspider] 44.1 kJ/mol [|chemicaldictionary] 4.73*10^4 J/mol [|HSDS]

49.3 kJ/mol [|umsl chem department]

0210 J/mol [|the journal of chemical thermodynamics] done adding to chemical sheet. 11/03/2011

[|Article that i choose from European polymer journal]
 * [Full Marks JCB]**

The most frequently used polymer, nylon 6, remains unreacted or partially reacted phases during the fast anionic polymerization, and the synthesis of new hybrid segment can improve the compatibility. The new technique makes two series of A-B-A type of nylon 6. Experimental Materials 10 hrs dried CL, HDI, PEG and PPG are used Spectroscopy Between 4000 cm-1 and 600cm-1, IR Spectroscopy of soft segment on the NaCl plate was studied. H and C NMR were recorded. GPC was done using DMF. By using Dupont 2100 thermal Analyzer, thermogravimmetric analysis was done, and the melting point and the glass transition temperature were between -80 and 300’c. WAXD were recorded. Mechanical property was recorded. the hardness measurements were recorded. Synthesis when diol reacts with HDI under 80’c toluene with N2, PEG/PPG is synthesized. When this PEG or PPG reacts with HYCAR ATBN, the b-a-b type nylon(hycar ATBN-PEG or PPG-Hycar ATBN) is synthesized. The HDI and caprolactum contains acyl groups which help soft segment B to functionalize. When soft segment B reacts with caprolactum HDI adduct, the end side of soft segment, acyl group, acts as the initiator for polymerization. For 16 hrs, polyether diol reacts with HDI followed by IR spectrophotometry and volumetric estimation of the NCO number. CL and HDI reaction, followed by IR spectrophotometer, is occurred. Crystallization makes HDI adduct purifies. PEU was added to HYCAR ATBN by drops, and this will use for synthesis of triblock copolymers. The mixture of above synthesized soft segment and CL and HDI adduct with CL were dried and then heated. Catalysis the above mixture. Component A and B were mixed, synthesize triblock copolymer and takes the data. Result and discussions IR spectroscopy The 1640cm-1 absorption is due to carbonyl group, and 1560cm-1 is due to NH deformation. The strong absorption at 1200cm-1 shows the ether linkages. The peaks of IR spectrum are due to nylon 6. NMR spectroscopy From C NMR, for the final block copolymers, same peak, around 67ppm, which is methoxy group were observed. Characteristic of nylon 6’s peaks were also observed, and from peaks we can define that the block copolymer formation is completed. From H NMR, 5.8 ppm, 2.3 ppm and 2.1 ppm peaks are CHCN and aliphatic protons, and shows all peaks are assigned to nylon 6. Thermal analysis There are 4 polymers each for PP and PE. Because of the diluent effect, coming from interaction between urethane or urea group of the soft segment, Tg and Tm are decreasing. X-ray diffraction analysis When the concentration of soft segment are increasing, block copolymer’s crystallinity is decreasing ,according to the x-ray diffraction analysis, due to the incorporation. Mechanical property When the tensile strength is decreasing, molecular weight is also decreasing due to increase of soft segment. Hardness When hardness decrease, the concentration of soft segment increase.(the soft segment increases as the polymer code increase) A-B-A type’s hardness is up to the hard segment’s concentration. Conclusion This new synthesis method works at higher CL concentration.

List 3 sources for database for polymer chemistry 1. [|Polymerprocessing] Great free database focused on polymer processing. searching polymer data from name, class and repeated formula lists.

2. [|POLYMERSnetBASE] searching engine covering polymer information via CRCnetBASE made up of about 8000 online books. [|Polymerdatabase] is also a great source for polymer searching and also operated from CHEMnetBASE from CRCnetBASE.

3. [|MSDS] searching engine for polymer's physical and chemical properties and focused on toxicity and handling information. (completed by sowonmoon)