Extruded Polystyrene (XPS)insulation and Polyisocyanurate (ISO)insulation Are Both Closed- Cell

question 43

Essay

Extruded polystyrene (XPS)insulation and polyisocyanurate (ISO)insulation are both closed- cell plastic foams, consisting essentially of the same chemical composition, and both have HCFC gas trapped in cell cavities. Yet their q- values are different. The q- value for ISO = 6.0 and that for XPS = 5.0. Why is that so?

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Definitions:

Decisional Roles

The roles assumed by managers or leaders related to making choices and decisions that affect the direction and operation of an organization or team.

Informational Roles

Roles in management where an individual acts as a point of contact, communicating information to and from the organization to help in decision-making processes.

Stress

A physical, mental, or emotional strain or tension resulting from adverse or demanding circumstances.

Decisional Role

A function involving making choices and decisions as part of one's responsibilities, often in a managerial or leadership context.