Vitrimer-like transparent blend films based on reactive blending of PC and PMMA with catalysis of Mg(TFSI)2

Yan, Tingzi; Li, Xianlu; Xu, Huihui; Li, Yongjin

doi:10.1016/j.coco.2022.101394

Cited by 3 publications

(1 citation statement)

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“…Reactions of the epoxy groups of EPOXY with carboxylic [ 21 ], hydroxyl [ 21 ], and amine [ 22 ] groups have been reported. Reactive blending of polymers is an effective method for improving the mechanical and thermal properties, morphology, water resistance, and reaction of the blend [ 23 , 24 ]. The reactions of the epoxy groups influence the thermal, morphological, and crystal behaviors of the polymer blend [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Bamboo Pulp Toughening Poly (Lactic Acid) Composite Using Reactive Epoxy Resin

Kiattipornpithak,

Rachtanapun,

Thanakkasaranee

et al. 2023

Polymers

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A novel poly (lactic acid) (PLA) composite with excellent mechanical properties, toughness, thermal stability, and water resistance was developed using a reactive melt-blending technique. PLA was melt mixed with epoxy resin (EPOXY) and bamboo pulp (PULP) to improve its reaction and mechanical properties. FTIR analysis confirmed the successful reaction of the PLA/EPOXY/PULP composites; the epoxy groups of EPOXY reacted with the –COOH groups of PLA and the –OH groups of PULP. The PLA/EPOXY/PULP5 composite showed a high tensile strength (67 MPa) and high toughness of 762 folding cycles, whereas the highest tensile strength was 77 MPa in the PLA/EPOXY5/PULP20 sample. SEM images presented a gap between the PLA and PULP; gap size decreased with the addition of EPOXY. The Tg of the PLA decreased with the EPOXY plasticizer effect, whereas the Tm did not significantly change. PULP induced crystallinity and increased Vicat softening of the PLA/PULP and PLA/EPOXY/PULP composites. The EPOXY reaction of the PLA/PULP composites improved their tensile properties, toughness, thermal stability, and water resistance.

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Section: Introductionmentioning

confidence: 99%

Bamboo Pulp Toughening Poly (Lactic Acid) Composite Using Reactive Epoxy Resin

Kiattipornpithak,

Rachtanapun,

Thanakkasaranee

et al. 2023

Polymers

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Compatibilizing and foaming of PC/PMMA composites with nano‐cellular structures in the presence of transesterification catalyst

Zhang,

Huang,

Zheng

et al. 2024

Polymer Engineering & Sci

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Compatibility of polycarbonate (PC) and polymethyl methacrylate (PMMA) alloys was improved by using a transesterification catalyst (SnCl2·2H2O). Modified PC/PMMA alloys exhibit single Tg, and their initial island phase existing in the SEM were transformed into uniform surface. Besides, the transmittance of the modified alloys was increased from original 40% to 85%. Moreover, PC/PMMA alloys and PC foams with micro‐cellular and nano‐cellular structures were prepared by solid‐state CO2 foaming in the presence of transesterification catalyst. Distinctively, there are obvious nano‐cellular structures existing in the PC samples, but no related nanostructures were found in PMMA samples, after treated by same amount of catalyst and foaming process for pure PC and PMMA matrix. Furthermore, the effects of foaming temperature and segment structure on their foaming behavior were also studied. Additionally, a uniaxial stress experiment was conducted at a specific temperature to simulate the biaxial stress during the foaming process for discovering the mechanism of nanopore formation. Therefore, the concept of nano‐cellular structures will point out a direction for the development of high‐performance, heat insulation PC materials of the next generation.Highlights Transesterification catalysts enhanced compatibility between PC and PMMA. Nanopore structures were successfully constructed in PC foams. Segment stretching was the main reason for the formation of nanopores.

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