4. In the past the polymer polyvinylchloride (PVC) has been produced in large quantities. Its formula is shown below. Pure PVC is too stiff, so it is mixed with other compounds, for example a plasticizer to soften it. In the past phthalates have been frequently used as a plasticizer, e.g. di(2-ethylhexyl) phthalate (DEHP) lit A (5 points) Which type(s) of intermolecular interactions are present between PVC and DEHP? B (5 points) Which type of functional group(s) does DEHP contain? DEHP is susceptible to moisture and may consequently degrade. C (5 points) Explain why DEHP is susceptible to moisture, and what type of degradation product(s) are formed