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Improvement of hydrophilicity of Natural Rubber Latex/Potato-Starch blend by grafting with hydrophilic monomers

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Abstract

Grafting by pre-irradiation technique is rarely reported in recent literature. In this respect, natural rubber latex (NRL) films and its blends with potato starch (NRL/P.St) were prepared at various compositions using solution casting technique. Pre-irradiated NRL films with gamma radiation at doses from 30 to 100 kGy were grafted with hydrophilic monomers namely, acrylic acid (AAc) and acrylamide (AAm) to enhance NRL hydrophilicity. The grafted films of NRL and NRL/P.St blends were structurally and morphologically characterized by different techniques including FTIR spectroscopy and scanning electron microscopy (SEM). Hydrophilicity properties of grafted films were studied intensively through evaluating water absorption percentage of the grafted films. The water absorption study concluded that NRL and NRL/P.St blend films grafted with acrylamide have higher water affinity than those grafted with acrylic acid monomer. Enhancing the hydrophilicity of NRL and NRL/P.St blend films make it possible to study the biodegradability of the prepared films. Studying the effect of incubation time in soil on the weight loss of samples showed that the biodegradability of NRL-g-AAm and NRL/P.St (70/30)-g-AAm is higher than their counterparts grafted with AAc. The results showed that the microbial activity inside the specimens in the case of grafted NRL films with AAm monomer was accelerated in the first 10 days in soil burial test. Calculation of the weight loss and digital photographs of the films showed significant differences after 90 days of incubation in soil and the films grafted with AAm have higher weight loss than those grafted with AAc.

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Authors and Affiliations

  1. Department of Radiation Chemistry, Egyptian Atomic Energy Authority (EAEA), P.O. Box 29, Cairo, Egypt

    Magida Mamdouh Mahmoud, Maysa Abdelatty Mohamed & Sayeda Mohamed Ibrahim

  2. Department of Polymer Chemistry, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), P.O. Box 29, Cairo, Egypt

    Faten Ismail Abou El Fadl

Authors
  1. Magida Mamdouh Mahmoud
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  2. Faten Ismail Abou El Fadl
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  3. Maysa Abdelatty Mohamed
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  4. Sayeda Mohamed Ibrahim
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Correspondence to Faten Ismail Abou El Fadl.

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Mahmoud, M.M., Fadl, F.I.A.E., Mohamed, M.A. et al. Improvement of hydrophilicity of Natural Rubber Latex/Potato-Starch blend by grafting with hydrophilic monomers. Iran Polym J 30, 1273–1284 (2021). https://doi.org/10.1007/s13726-021-00974-1

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  • DOI: https://doi.org/10.1007/s13726-021-00974-1

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