Chemical structure water absorbency and thermal properties of poly(acrylamide-co-acrylic acid)-grafted-poly(styrene-co-methyl methacrylate)

• Main Authors: Ros Azlinawati, Ramli, Shahrir, Hashim, Waham Ashaier, Laftah
• Format: Conference or Workshop Item
• Language: English; English
• Published: 2018
• Subjects: QD Chemistry
• Online Access: http://umpir.ump.edu.my/id/eprint/22131/1/41.%20Chemical%20structure%20water%20absorbency%20and%20thermal%20properties%20of%20poly.pdf; http://umpir.ump.edu.my/id/eprint/22131/2/41.1%20Chemical%20structure%20water%20absorbency%20and%20thermal%20properties%20of%20poly.pdf; http://umpir.ump.edu.my/id/eprint/22131/
• Institution: Universiti Malaysia Pahang

This contribution presents the characterization of poly(acrylamide-co-acrylic acid)-grafted-poly(styrene-co-methyl methacrylate) [poly(AAm-co-AAc)-g-poly(St-co-MMA)] The chemical structure of poly(AAm-co-AAc)-g-poly(St-co-MMA) microgels was proposed. The effect of MBA contents on the degree of cross-linking (%), water absorbency (EWC, %), glass transition temperature, Tg and thermal degradation were studied. Degree of cross-linking (%) and EWC, % were increase at 1.5 to 1.675 wt.% of MBA might be due to mono cross-links of MBA. The fluctuation of Tg and melting temperature (Tm) from 1.85 to 2.2 wt.% of MBA might be due to di, poly and cyclic cross-links of MBA. Decomposition of poly(AAm-co-AAc)-g-poly(St-co-MMA) was slightly affected by increasing in MBA contents from 1.5 to 2.2 wt.%. Tg of poly(AAm-co-AAc)-g-poly(St-co-MMA) was decreased at 1.5 to 1.675 wt.% of MBA due to increasing in ordered structure and crystallinity content, which led to increase in Tm.