تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Photochromic properties of 1′,3′,3′ -trimethyl-6- nitrospiro[2H-1-benzopyran-2,2′-indoline] doped in PMMA and epoxy resin thin films
Photochromic properties of 1′,3′,3′ -trimethyl-6- nitrospiro[2H-1-benzopyran-2,2′-indoline] doped in PMMA and epoxy resin thin films
 
الموضوع : كيمياء 
لغة الوثيقة : الانجليزية 
المستخلص : Purpose - The purpose of this paper is to evaluate the photochromic performance of photochromic compounds in polymer matrices. Design/methodology/ approach - The poly(methyl methacrylate) (PMMA) and epoxy resin doped with photochromic spirobenzopyran were prepared and the effects of ultraviolet (UV) irradiation were studied using spectrophotometer. The reversible reaction was effected using white light. Photochemical fatigue resistance of these films was also studied. Findings - Irradiation of colourless 1′,3′,3′- trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-indoline] spiropyran (SP) doped in PMMA and epoxy resin with UV light (366 nm) results in the formation of an intense purple-red coloured zwitterionic photomerocyanine (PMC). The reverse reaction was photochemically induced by irradiation with white light. Photocolouration of SP doped in PMMA follows a first-order rate equation (k = 0.0011 s-1), while that doped in epoxy resin deviates from linearity. It was found that photobleaching follows a first-order equation in both matrices. The photobleaching rate constant of PMC in both matrices is the same and equals 0.0043 s-1. Spirobenzopyran doped in PMMA shows better fatigue resistance than that doped in epoxy resin. Research limitations/ implications - The PMMA and epoxy resin polymers doped with photochromic spirobenzopyran described in the present paper were prepared and studied. The principle of study est blished can be applied to any type of polymer or to any type of photochromic compounds. Practical implications - The photochromic materials developed can be used for different applications, such as coatings and holography. Originality/value - The method developed may be used to enhance the performance of photochromic materials. 
ردمد : 0369-9420 
اسم الدورية : Pigment and Resin Technology 
المجلد : 39 
العدد : 2 
سنة النشر : 1431 هـ
2010 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Tuesday, February 28, 2012 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
Abood A BahajajBahajaj, Abood Aباحثدكتوراه 
عبدالله محمد عسيريAsiri, Abdullah Mohamedباحثدكتوراهaasiri2@kau.edu.sa
أميرة محمد الصليميAlsoliemy, Amerah Mohammedباحثدكتوراه 
Abdullah G M Al-SehemiAl-Sehemi, Abdullah G Mباحثدكتوراه 

الملفات

اسم الملفالنوعالوصف
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