Positron Trapping In Nano Free Volumes of Deformed Polymeric Materials Год выпуска: 2012Автор: Amer Mahmoud Amer Hassan Amer and Mona MohsenИздательство: LAP Lambert Academic PublishingСтраниц: 108ISBN: 9783659236457Описание Positron annihilation lifetime spectroscopy (PALS) has been applied in natural rubber to determine the properties of nano free volumes (size, concentration, distribution) as a function of temperature. The analysis of the PAL spectra have been performed by finite as well continuous methods using the routine L.T 9.0 in its discrete and distribution modes respectively. The results have proven, that the PALS is sensitive to probe the glass transition temperature and for the first time the melting transition temperature in natural rubber. In addition, the free positrons are found to be sensitive to the low density domains in the crystalline matrix as well as in the interphase between crystalline and amorphous phase. The deduced expansion coefficient indicating that o-ps is probing selectively free volume sites in amorphous domains.
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Александр Большое спасибо. Был приятно поражен Вашей оперативностью и профессиональным подходом к делу. Сейчас смотрю "работки" :) и в очередной раз сожалею, что не могу учиться полноценно, приходится идти на всякие ухищрения. Хотя, даже если я просто успею прочитать Ваши материалы, мне кажется, я уже многое вынесу из процесса обучения по специальности юриспруденция :) Еще раз спасибо.
