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Interpenetrating Polymer Networks (IPNs) in Drug Delivery System (Paperback)
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Interpenetrating Polymer Networks (IPNs) in Drug Delivery System (Paperback)
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An Interpenetrating Polymer Network (IPN) is the normal form of two
or more crosslinked polymers. These are water soluble networks and
are rendered insoluble due to the presence of chemical or physical
crosslinks. As IPNs have high water uptaking capacity and
biocompatibility to natural tissues, these are used in biomedical
and pharmaceutical applications like drug-delivery systems.
Characteristics of IPNs like % swelling, number average molecular
weight between crosslinks, mesh size, compressive strength vary
when these are formed from different crosslinking agents and are
allowed to swell in different environment of pH and temperature.
Poly Vinyl Alcohal (PVA) is a tough polymer and is highly
water-soluble. When Semi-IPN of PVA/AA (Acrylic Acid) is formed
using Glutraldehyde(GA)/TMPTA or GA/BIS crosslinker, the space
between the mesh becomes smaller and stronger. As a result, it
becomes super water retainer for carrying some substance in aquatic
mediums. Due to anionic nature of AA, %swelling of IPN increased as
compared to hydrogel of pure PVA . Thus, used to carry model drug
Etophylline.
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