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Structural Organization of Poly(vinyl alcohol) Hydrogels Obtained by Freezing/Thawing and J-Irradiation Processes: A Small-Angle Neutron Scattering (SANS) Study

T. Puspitasari, TP and K.M.L. Raja, KMLR and D.S. Pangerteni, DSP and A. Patriati, AP and E.G.R. Putra, EGRP (2012) Structural Organization of Poly(vinyl alcohol) Hydrogels Obtained by Freezing/Thawing and J-Irradiation Processes: A Small-Angle Neutron Scattering (SANS) Study. Procedia Chemistry, 4. pp. 186-193.

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Abstract

The structural organization of poly(vinil alcohol) (PVA) hydrogels obtained by repeatedly freeze/thaw and J-irradiation processes of 15% w/w PVA solution in D2O has been revealed by small-angle neutron scattering (SANS) technique. The opaque sample is due two separated phases which composed by polymer-rich and polymerpoor regions occurred from freezing/thawing samples, while transparent sample formed from irradiated PVA hydrogels sample. It has been pointed out from SANS experimental data that the cross-linking in the gels formed by freezing/thawing process are crystallites as the scattering intensity I(Q) decreases with the momentum transfer Q according to the -4th power law (Porod’s law) in the high Q-range region. From SANS data analysis, the radius of the crystallite size is about 28 - 33 Å and its distributed inhomogeneously with the average distance of 150 - 175 Å in the polymer-rich phase that consisted by crystalline PVA aggregates and swollen amorphous PVA. In opposite, the irradiated PVA hydrogels with the irradiation dose of 40 kGy did not show a -4th power law scattering due to in absence of crystalline and amorphous PVA phases in the polymer-rich region.

Item Type: Article
Subjects: Rekayasa Perangkat dan Fasilitas Nuklir > Teknologi Proses Fasilitas Nuklir
Divisions: Sekolah Tinggi Teknologi Nuklir
Depositing User: USER STTN BATAN
Date Deposited: 22 Nov 2018 08:43
Last Modified: 22 Nov 2018 08:43
URI: http://repo-nkm.batan.go.id/id/eprint/1205

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