Determine whether the first part of statement will INCREASE, DECREASE or have NO EFFECT in the second part of the statement. 1. If there is an increase in karat of gold, the strength will ______. 2. If there is an increase in crosslink of a linear polymer, then the degree of amorphousness will _____. 3. If there is an increase in polar groups, then the degree iof polymerization will _____.

Question 5 a. Describe TWO (2) important factors that affect materials chain flexibility and properties b. Discuss briefly factors that influencing plastic properties. c. What are important factors influencing glass transition temperature of amorphous polymers?

a) List down the four molecular structures for polymers. Discuss in detail how the four molecular structures affect the level of strength of the resulting polymers according to their order. b) Define composites. Describe the phase present in composites. With time,the use of composite in aircraft body has increased to 50% discuss the advantages of composites as compared to conventional materials in aerospace industry c) List down one processing method for production of composite tubes made of fiber reinforced polymer.Briefly describe the processing steps involved.