Hi Jenny, This is a part of the lecture for the advanced level in polymer chemistry. The full course can be found on the Explained chemistry website explainedchemistry.com/chemistry-courses/introduction-to-polymer-chemistry/ or on Udemy: www.udemy.com/course/introduction-to-polymer-chemistry/ You can enroll in "Principles of polymer chemistry" for beginners: explainedchemistry.com/chemistry-courses/principles-of-polymer-chemistry/