Answered: Imagine a PEEK implant that is 1.612 cm…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Shape memory polymers are a class of materials that can remember their original shape and transition between shapes when stretched, twisted, or compressed. They have recently found uses in orthopedics and as other surgical and dental implants. One of the most promising new materials is PEEK (polyether ether ketone). It is a very good electrical and thermal insulator. As a dental implant material, it provides the patient a comfortable implant that does not conduct heat or alter taste, which can be a constant bother with traditional materials (see the photo). Imagine a PEEK implant that is 1.612 cm in length with a circular radius of 1.327 mm. Note that 1 meter = 100 cm = 1000 mm. An ice cube is in contact with the end of the implant. How much heat is transferred along the length of the implant in 36 seconds, if the change in temperature across the implant is 27 °C? The thermal conductivity of PEEK is 0.25 W/(m · C°). Note that your answer is a small number, indicating that this implant material is an excellent thermal insulator as desired.

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