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Preparation of Chloro Penta Amine Cobalt (III) Chloride and Investigate its Influence on the Structural Properties and Acoustical Parameters of Polyvinyl Alcohol

Authors: Nada K. Abbas ندى كاظم عباس --- Majeed Ali Habeeb مجيد علي حبيب --- Alaa J. Kadham Algidsawi الأء جواد كاظم
Journal: Journal of Kufa - physics مجلة الكوفة للفيزياء ISSN: 20775830 Year: 2015 Volume: 7 Issue: 2 English and Arabic Pages: 81-96
Publisher: University of Kufa جامعة الكوفة

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Abstract

Chloro penta amine Cobalt (III) Cloride [Co(NH3)5Cl]Cl2 was prepared then characterized by FTIR and XRD . The obtained results indicated the formation of Orthorhombic [Co(NH3)5Cl]Cl2 nano particles of ≈ 28.75 nm size .Polymeric films based on polyvinyl alcohol PVA doped with Chloro penta amine Cobalt (III) Cloride [Co(NH3)5Cl]Cl2 at different weight percent ratios were prepared using the solvent cast technique. The structural properties of these polymeric films were examined by XRD, FTIR and SEM studies. The complexation of the additive with the polymer was confirmed by FTIR and SEM studies. The XRD pattern revealed that the amorphousicity of PVA polymer matrix increased with raising the [Co(NH3)5Cl]Cl2 content. Ultrasonic pulse technique of variable frequency (25, 30, 35 and 40) kHz were performed to study the influence of ultrasonic frequency on the mechanical properties of PVA/ [Co(NH3)5Cl]Cl2 composite. Some properties such as ultrasonic velocity, acoustic impedance ,bulk modulus and transmittance and relaxation amplitude were found to be decreasing with frequency while absorption coefficient and compressibility were increasing with frequency .Results showed that ultrasonic wave made degradation to the randomly coiled polymer chains ,when ultrasonic frequency increase there were more degradation that increasing the number of un-tied chains as a result of absorbing composite ultrasonic waves ,for this reason it could be pointed that PVA/[Co(NH3)5Cl]Cl2 composite as a good ultrasonic absorber. It was found that there was significant relationship between ultrasonic velocity and material properties


Article
Study of the Effect of Berry Paper Mulberry on Optical Properties of Poly Methyl Methacrylate
دراسة تاثير ورق الكرز على الخواص البصرية للبولي مثيل ميثاكريلايت

Authors: Hussein Hakim حسين حاكم --- Angham.G.Hadi انغام غانم --- Ayad Mohammad اياد محمد --- Ghaidaa Abdul Hafidh غيداء عبد الحافظ --- et al.
Journal: Baghdad Science Journal مجلة بغداد للعلوم ISSN: 20788665 24117986 Year: 2014 Volume: 11 Issue: 2 عدد خاص بالمؤتمر النسوي الثاني Pages: 695-701
Publisher: Baghdad University جامعة بغداد

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Abstract

In this work, study the optical properties of composites consisting of poly Methyl Methacrylate and Berry Paper Mulberry. The samples of composites were prepared using casting method .The Berry Paper Mulberry (BPM) was added by different concentrations are (0, 2, 4 and 6)wt.%. The optical properties of composites have been studied in the wavelength range (200-800)nm. The absorption coefficient ,energy gap, refractive index, extinction coefficient and dielectric constants have been determined. The results show that the optical constants change with increase of BPM concentrations .

في هذا البحث تم دراسة الخواص البصرية للمتراكبات المتكونة من بولي مثيل ميثاكريلايت وورق الكرز. النماذج تم تحضيرها باستخدام طريقة الصب. وتم اضافة تراكيز مختلفة من ورق الكرز هي (0, 2, 4 and 6)wt.%.. الخواص البصرية للمتراكبات درست ضمن مدى طول موجي(200-800)nm. وحسب معامل الامتصاص، فجوة الطاقة، معامل الخمود، معامل الانكسار وثوابت العزل الكهربائي. بينت النتائج تغير الثوابت البصرية مع زيادة تراكيز ورق الكرز.

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