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A thermal analysis was also performed on both the infiltrated and non-infiltrated printed samples , and it was recorded that the incorporation of the polymer resulted in a larger coefficient of thermal expansion on the infiltrated systems .
 process characterization: thermal analysis; concept or principle: samples; material: polymer; machanical property: coefficient of thermal expansion
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: thermal analysis, samples, polymer, coefficient of thermal expansion 
Answer:
 process characterization: thermal analysis; concept or principle: samples; material: polymer; machanical property: coefficient of thermal expansion