Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide
In this study, we aimed to enhance the reactivity of polycarbonate (PC) with the epoxy group of styrene-co-glycidyl methacrylate copolymer (SGMA) by introducing aqueous solutions of sodium hydroxide during the melt processing of PC. This approach led to the generation of hydroxyl groups at the ends...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
|
| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941823003161 |
| _version_ | 1827794166849994752 |
|---|---|
| author | Youngsoo Choi Hyungsu Kim |
| author_facet | Youngsoo Choi Hyungsu Kim |
| author_sort | Youngsoo Choi |
| collection | DOAJ |
| description | In this study, we aimed to enhance the reactivity of polycarbonate (PC) with the epoxy group of styrene-co-glycidyl methacrylate copolymer (SGMA) by introducing aqueous solutions of sodium hydroxide during the melt processing of PC. This approach led to the generation of hydroxyl groups at the ends of PC molecules, facilitating the formation of PC-SGMA copolymer. The effectiveness of this method in improving the compatibility of PC and styrene-acrylonitrile (SAN) blends was successfully confirmed through blending experiments with SAN and SGMA. Additionally, we investigated the impact of alkali-promoted hydrolysis on the rheological properties of PC, apart from the functionalization of PC end groups. Our findings revealed that an increase in the concentration of sodium hydroxide resulted in a decrease in the complex viscosity of PC. However, beyond a certain concentration level, the viscosity exhibited an upward trend. Furthermore, when constructing van Gurp-Palmen plots for the modified PC, we observed a significant deviation in curve shape compared to pure PC or water-modified PC. This observation suggests that changes in the microstructure occur during the degradation process due to the interaction between PC molecules and sodium ions. |
| first_indexed | 2024-03-11T18:28:50Z |
| format | Article |
| id | doaj.art-529bafee9b404d57ba5cec0f6c58525c |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-03-11T18:28:50Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-529bafee9b404d57ba5cec0f6c58525c2023-10-13T13:51:50ZengElsevierPolymer Testing0142-94182023-11-01128108236Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxideYoungsoo Choi0Hyungsu Kim1Department of Chemical Engineering, Dankook University, 152 Jukjeon-ro, Yongin-si, Gyeonggi, 16890, South KoreaCorresponding author.; Department of Chemical Engineering, Dankook University, 152 Jukjeon-ro, Yongin-si, Gyeonggi, 16890, South KoreaIn this study, we aimed to enhance the reactivity of polycarbonate (PC) with the epoxy group of styrene-co-glycidyl methacrylate copolymer (SGMA) by introducing aqueous solutions of sodium hydroxide during the melt processing of PC. This approach led to the generation of hydroxyl groups at the ends of PC molecules, facilitating the formation of PC-SGMA copolymer. The effectiveness of this method in improving the compatibility of PC and styrene-acrylonitrile (SAN) blends was successfully confirmed through blending experiments with SAN and SGMA. Additionally, we investigated the impact of alkali-promoted hydrolysis on the rheological properties of PC, apart from the functionalization of PC end groups. Our findings revealed that an increase in the concentration of sodium hydroxide resulted in a decrease in the complex viscosity of PC. However, beyond a certain concentration level, the viscosity exhibited an upward trend. Furthermore, when constructing van Gurp-Palmen plots for the modified PC, we observed a significant deviation in curve shape compared to pure PC or water-modified PC. This observation suggests that changes in the microstructure occur during the degradation process due to the interaction between PC molecules and sodium ions.http://www.sciencedirect.com/science/article/pii/S0142941823003161PolycarbonateHydrolysisControlled degradationRheological properties |
| spellingShingle | Youngsoo Choi Hyungsu Kim Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide Polymer Testing Polycarbonate Hydrolysis Controlled degradation Rheological properties |
| title | Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide |
| title_full | Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide |
| title_fullStr | Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide |
| title_full_unstemmed | Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide |
| title_short | Degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide |
| title_sort | degradation behavior of polycarbonate during melt processing with an aqueous solution of sodium hydroxide |
| topic | Polycarbonate Hydrolysis Controlled degradation Rheological properties |
| url | http://www.sciencedirect.com/science/article/pii/S0142941823003161 |
| work_keys_str_mv | AT youngsoochoi degradationbehaviorofpolycarbonateduringmeltprocessingwithanaqueoussolutionofsodiumhydroxide AT hyungsukim degradationbehaviorofpolycarbonateduringmeltprocessingwithanaqueoussolutionofsodiumhydroxide |