Hydrogen bonds can be classified into intermolecular and intramolecular hydrogen bonds . Intermolecular hydrogen bonding occurs between different molecules, as seen in $\text{H}_2\text{O}_2$, $\text{HCN}$, and concentrated acetic acid (which forms dimers due to intermolecular H-bonding) . Intramolecular hydrogen bonding occurs within the same molecule . Cellulose is a long, unbranched polysaccharide composed of glucose units. Its linear chain structure is highly stabilized by extensive intramolecular hydrogen bonds between the hydroxyl groups of one glucose ring and the oxygen atoms of the adjacent ring within the same polymer chain.