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首页> 外文期刊>Physica, B. Condensed Matter >Analytical calculations and properties of y-rays polymerization of novel acrylates copolymer system
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Analytical calculations and properties of y-rays polymerization of novel acrylates copolymer system

机译：新型丙烯酸酯共聚物体系Y射线聚合的分析计算和性质

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A detailed study of some physical properties of pure PMMA (polymethyl methacrylate) film and MMA/Ani (methyl methacrylate/aniline) films is presented. Films of thicknesses ranged from 0.04 to 0.72 mmfor MMA/Ani were prepared while it is 0.68 mm for PMMA. The structure of the sample is analyzed byX-ray diffraction technique and is found to be amorphous (PMMA) and partially crystalline (MMA/Ani).Ultra violet-visible electronic absorption spectra measurements were analyzed to obtain someimportant parameters such as molar extrication coefficient, oscillator strength, dipole strength andhaving good thermal stability (T_d>300℃) was also reported. TGA studies revealed that the thermalstability of polymethyl methacrylate, prepared by radiation polymerization of methyl methacrylate,improved after copolymerization with aniline. Also, optical behavior of film samples was analyzed byobtaining transmission spectra, in the wavelength range of 200-1100 nm. It was found that all studiedsamples lead to the appearance of a second edge at lower photon energy due to the formation of theinduced energy states. From the intensity of absorption interband transitions (B and Q) which areassigned as type π-π~*for both PMMA and MMA/Ani films, the energy gaps E_g1and E_g2were calculatedrespectively. The optical conductivity (a) was determined and it was found that with the increase ofthicknesses optical energy gap decreases monotonically and the refractive index increases.
机译：详细介绍了纯PMMA（聚甲基丙烯酸甲酯）薄膜和MMA / Ani（甲基丙烯酸甲酯/苯胺）薄膜的一些物理性能。制备厚度范围为MMA / Ani的0.04至0.72 mm的薄膜，而制备PMMA的厚度为0.68 mm。通过X射线衍射技术分析样品的结构，发现其为无定形（PMMA）和部分结晶（MMA / Ani）。还报道了其具有的振荡强度，偶极强度和良好的热稳定性（T_d> 300℃）。 TGA研究表明，与苯胺共聚后，通过甲基丙烯酸甲酯的辐射聚合制备的聚甲基丙烯酸甲酯的热稳定性得到了提高。另外，通过获得在200-1100nm波长范围内的透射光谱来分析膜样品的光学行为。发现所有研究的样品由于形成了诱导的能态而在较低的光子能量下导致了第二边缘的出现。从吸收带间跃迁的强度（B和Q）（对于PMMA和MMA / Ani膜而言均为π-π〜*型），分别计算出能隙E_g1和E_g2。测定了光导率（a），发现随着厚度的增加，光能隙单调减少，折射率增加。

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