Thermal and optical characteristization of prepolymers and block copolymers of polycyclohexalene cyclohexanedicarboxamides and cyclohexanecarboxylates and polyphenylene terephthalamides, terephthalates and isophthalates, 1982
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@ Clark Atlanta University
Abengowe, Ngozi M
Description
Degree Type: thesisDegree Name: Master of Science (MS)Date of Degree: 1982Granting Institution: Atlanta UniversityDepartment/ School: Department of ChemistryThe thermal and optical charactertization of aliphatic and aromatic polya�mides; aromatic and aliphatic polyesters; and their corresponding block copolymers are discussed. Two thermal analysis techniques, differential scanning calorimetry and thermogravimetry were employed to obtain the glass transition temperatures, (Tg), the melting temperatures, (Tm), and the decomposition temperatures, (T^), of the following polymers: poly( cis, trans-1,4-cyclohexalene- trans-1,4-cyclohexane- dioate); poly( 1,4-phenylene terephthalate); poly( 1,2-cyclohexanelene-trans-1,4- cyclohexanedicarboxamide); poly(l ,4-phenylene terephthalamide); poly(2-methyl-1.3- phenylene terephthalate); poly(2-methyl-1,3-phenylene isophthalate); polyCcis- 1,2-cyclohexalene- cis-l,2-cyclohexanedioate); poly(2-methyl-l,3-phenylene isoph�thalate; poly(trans-l,2-cyclohexalene-trans-l,2-cyclohexane-dioate); poly(trans-1.4- cyclohexalene-trans-l,4-cyclohexanedioate); and poly (cis-1,4-cyclohexalene- trans-1,4-cyclohexanedioate). Poly(l ,4-phenylene terephthalate), poly(l ,4-phenylene terephthalamide), and poly(trans-l,4-cyclohexalene-trans-l,4-cyclohexanedioate are found to form liquid crystalline solutions from preliminary examinations using polarizing microscopy.
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Bota, Kofi BPolk, Malcolm B
