Dissertation
Dissertation > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers

Polymer dispersed organic photochromic compounds and properties of thin films

Author ZhangGuoDong
Tutor JieXiaoLin;ZhouXingPing
School Huazhong University of Science and Technology
Course Polymer Chemistry and Physics
Keywords Photochromic film Polymer dispersion PMMA PS Spiropyran Pyrazolone DOP
CLC O631.3
Type Master's thesis
Year 2008
Downloads 134
Quotes 3
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Film-forming method using the solution , respectively, of 8 - nitro-1 ', 3' , 3' - trimethyl- spiro indoline benzopyran (SP) and 1,3 - diphenyl-4 - m-chlorophenyl sub- methyl-5 - pyrazolone ketal N (4) - methyl - thiosemicarbazide (DP3ClBP-MTSC) dispersed in poly (methyl methacrylate) (PMMA) or polystyrene (PS) to prepare the polymerization dispersed organic photochromic compound thin film , the use of n-octyl phthalate (DOP) as a plasticizer, a light response speed control of film . The thermal properties of the films , mechanical properties and photochromic properties. The results showed that : SP-PMMA and SP-PMMA-DOP photochromic film and the heat is faster than achromatic SP-PS , and SP-PS-DOP photochromic film and thermal decoloring rate. Plasticizer DOP effectively improve the photochromic film and the thermal decoloring rate. Polymer-dispersed spiropyran photochromic film glass transition temperature of the polymer matrix than the glass transition temperature decreased, added DOP, the glass transition temperature is further reduced. SP-PMMA and SP-PMMA-DOP of tensile strength and elongation at break greater than SP-PS , and SP-PS-DOP of tensile strength and elongation at break . Hand [DP3ClBP-MTSC]-PMMA and [DP3ClBP-MTSC]-PMMA-DOP photochromic film DP3ClBP-MTSC rates than their photochromic rate decreased 60 to 100-fold lower rate of heat achromatic 8-10 times . Plasticizer DOP can be improved photochromic film and thermal decoloring rate. DP3ClBP-MTSC content of 10 %, the glass transition temperature is above the polymer glass transition temperature of the substrate ; when DP3ClBP-MTSC content to 30 %, the glass transition temperature is below the polymer glass transition temperature of the substrate .

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