Which of the following statements is/are false? (P) PMMA is used as a glass substitute. (Q) Kydex is a vinyl polymer and used in the making of firearm holsters. (R) PVC in water suspension is used as a glue.

(P) Poly methyl methacrylate (PMMA) is produced by the homopolymerisation of methyl methacrylate. PMMA is a transparent thermoplastic and used as a glass substitute. (Q) Kydex is a line of thermoplastic acrylic-polyvinyl chloride materials manufactured by Kydex LLC. It has a wide variety of applications, including for firearm holsters and sheaths for knives. (R) Polyvinyl acetate (PVAc) is made by polymerization of vinyl acetate. In a water suspension, this is used as a glue. Polyvinyl chloride (PVC) is made by polymerization of the monomer vinyl chloride and is used in the formation of pipes. Hence, only statement R is false.