Bibliographic Details
| Title: |
Emulsion Polymerization of PMMA onto Natural Rubber |
| Authors: |
Lease, Jacqueline, Sahin, Zeynep-Munteha, Andou, Yoshito |
| Source: |
ACS Applied EngineeringMaterials; August 2023, Vol. 1 Issue: 8 p2247-2254, 8p |
| Abstract: |
PMMA-grafted natural rubber copolymers (NR-PMMA) are successfully synthesized by using emulsion polymerization. The effects of the two types of the radical initiator with or without a reversible addition-fragmentation chain transfer (RAFT) agent to polymerize methyl methacrylate (MMA)-grafted natural rubber are elucidated. In this work, a dibenzoyl peroxide (DBP) initiator shows a higher grafting rate (24.63%) as compared to a 2,2′-azobis(isobutyronitrile) (AIBN) initiator without a RAFT agent. The structural characterization of the obtained copolymers is conducted by proton nuclear magnetic resonance (1H NMR) and attenuated total reflectance/Fourier transform infrared (ATR-FTIR). According to the GPC analysis, RAFT in the emulsion polymerization process is difficult to happen in this current system as a high PDI (4.72) and a low molecular weight (3.43 × 105) are acquired. Further investigation is needed to allow RAFT in the emulsion process to proceed more rapidly. The changes in the glass transition temperature (Tg) and degradation temperature (Td) confirmed the improvement of the thermal properties of the graft copolymers. In addition, the mechanical properties of NR-PMMA copolymers increased with an increase of the grafting efficiency of PMMA. Thus, this approach is an effective way to produce natural rubber-based products. |
| Database: |
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