Polymers producing HCI as condensate:
Polycarbonate

Explanation:
Polycarbonate is a type of polymer that produces hydrochloric acid (HCI) as a condensate during its production. This condensation reaction occurs during the synthesis of polycarbonate through a process called interfacial polymerization.

Interfacial Polymerization:
Interfacial polymerization is a technique used to produce polycarbonate by the reaction between bisphenol A (BPA) and phosgene. This reaction takes place at the interface of two immiscible phases, usually an aqueous phase and an organic phase.

Reaction:
The reaction between BPA and phosgene can be represented as follows:
BPA + Phosgene → Polycarbonate + Hydrochloric Acid (HCI)

Formation of HCI:
During the interfacial polymerization process, one of the byproducts is hydrochloric acid (HCI). HCI is formed as a result of the reaction between phosgene and any residual water present in the system. This reaction is exothermic and releases HCI gas as a byproduct.

Significance of HCI Formation:
The formation of HCI is an important aspect of the polycarbonate production process. It helps in controlling the reaction kinetics and ensures the proper formation of the polymer chain. HCI also acts as a catalyst in the polymerization reaction, promoting the formation of polycarbonate.

Removal of HCI:
After the formation of HCI, it is necessary to remove it from the system to prevent any adverse effects on the final product. This is typically done by neutralizing the HCI with a base, such as sodium hydroxide (NaOH), to form a salt, such as sodium chloride (NaCl), which is water-soluble and can be easily separated.

Conclusion:
In summary, polycarbonate is the polymer that produces HCI as a condensate during its production. The interfacial polymerization process between BPA and phosgene results in the formation of HCI as a byproduct, which is subsequently neutralized and removed from the system.