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Polymer weld theory is utilized to predict the strength at these different zones , where material properties are obtained through rheology measurements .
 material: Polymer; machanical property: strength; concept or principle: material properties; machanical property: rheology
Please list all entity words in the text that fit the category.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} 
Answer:
 material: Polymer; machanical property: strength; concept or principle: material properties; machanical property: rheology