Effects of Illuminance and Heat Rays on Photo-ControlledLiving Radical Polymerization Mediated by 4-Methoxy-2,2,6,6-Tetramethylpiperidine-1-Oxyl
المؤلف
المصدر
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-6، 6ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-07-19
دولة النشر
مصر
عدد الصفحات
6
التخصصات الرئيسية
الملخص EN
The effects of illuminance and heat rays released from the light source on the photo-controlled/living radical polymerization of methyl methacrylate were investigated with the aim of strict control of molecular weight.
The bulk polymerization was performed at room temperature using 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl as the mediator and (2RS,2′RS)-azobis(4-methoxy-2,4-dimethylvaleronitrile) as the initiator in the presence of (4-tert-butylphenyl)diphenylsulfonium triflate as the accelerator by irradiation with a high-pressure mercury lamp.
The polymerization by the direct irradiation from the light source yielded polymers containing an uncontrolled high-molecular-weight polymer and having the molecular weight distribution over 3.
On the other hand, the polymerization by the indirect irradiation with reflective light using a mirror produced polymers with controlled molecular weights with comparatively narrow molecular weight distribution at ca.
1.4.
Too high an illuminance caused an increase in the molecular weight distribution.
During the polymerization, the monomer conversion increased as the illuminance increased.
It was found that the elimination of heat rays from the illuminating light was indispensable for the molecular weight control by the photo-controlled/living radical polymerization.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Yoshida, Eri. 2012. Effects of Illuminance and Heat Rays on Photo-ControlledLiving Radical Polymerization Mediated by 4-Methoxy-2,2,6,6-Tetramethylpiperidine-1-Oxyl. ISRN Polymer Science،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-446441
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Yoshida, Eri. Effects of Illuminance and Heat Rays on Photo-ControlledLiving Radical Polymerization Mediated by 4-Methoxy-2,2,6,6-Tetramethylpiperidine-1-Oxyl. ISRN Polymer Science No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-446441
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Yoshida, Eri. Effects of Illuminance and Heat Rays on Photo-ControlledLiving Radical Polymerization Mediated by 4-Methoxy-2,2,6,6-Tetramethylpiperidine-1-Oxyl. ISRN Polymer Science. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-446441
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-446441
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر