Modification of gamma transmittance at gamma dose absorbed flexible poly (imide siloxane) block copolymer with high thermal performance feature

ABSTRACT

Flexible poly (imide siloxane) block copolymer (which was not adhesive feature) was exposed to gamma radiation at 10 kGy by using a certified Co-60 radioisotope for the evaluation of its optimum application condition in gamma irradiation fields with high dose. High gamma dose application has caused to display tuneable high-temperature features as the result of its density development due to radiation hardness effect at 10 kGy. The development of the polysilicon-11 crystallites has caused a decrease in the penetration of gamma photons at the irradiated flexible copolymer due to the gamma absorbed dose. The elimination of the agglomeration by high gamma dose application has assisted the development of the grainy surface at the irradiated flexible copolymer with a more homogeneous structure. The development of the gamma shielding performance of the irradiated polymer has explained the optimum synthesis conditions for the solution of the gamma dose problems at high-temperature applications in contact with the contoured surface (including different heights, depths curvatures on the surface and presenting importance in radiation shielding design and engineering) at high gamma dose areas. A comparison of penetration deepness of gamma photons has indicated its performance (at 0.662 MeV by using the Cs-137 radioisotope and at 1.25 MeV by using the Co-60 radioisotope by using the gamma transmission technique) to determine the details about the density variations of this polymer. The hybrid copolymer was improved to support the development of polymeric instruments for new trend applications in computing and artificial intelligence, biotechnology, and internet of things (for smart monitoring and sensing technology).

KEYWORDS:

• Block copolymer
• gamma dose
• hybrids
• polyimides
• radioisotope
• siloxane

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported with PhD Thesis project with 37805 no by Istanbul Technical University ITU BAP.

Notes on contributors

Turkan Dogan

Dr. Turkan Dogan RESEARCH INTERESTS are focused on material science, polymer based material synthesis (flexible, high tempearature and radiation resistant), nanomaterials, biomaterials, material characterization, radiation transmission techniques, X-ray radiography (non-destructive testing), radiation protection and shielding, solid state physics, semiconductor physics, synthesis of semiconductor nanocrystals, semiconductor thin films and deposition, semiconductor nanocrystal growth, X-ray spectroscopies, surface analysis techniques (SEM, AFM), X-ray diffraction and crystallography technique, spectrum modeling and simulation of nanocrystal structures.

Nilgun Baydogan

Prof. Dr. Nilgun Baydogan RESEARCH INTERESTS are focused on the layers which ionizing radiation strikes on materials. Her working area encompasses the use of thin-film solar cells, flexible polymer nanocomposites, self-healing polymer nanocomposites, and living polymer in several industrial areas (for instance, aerospace applications, high altitude platforms to obtain high performance and radiation protection of optoelectronic equipment, and aircrew at the service area).