Copolymers containing two types of reactive groups: New compatibilizer for immiscible PLLA/PA11 polymer blends

Yang, Xin; Wang, Hengti; Chen, Jiali; Fu, Zhiang; Zhao, Xuewen; Li, Yongjin

doi:10.1016/j.polymer.2019.05.074

Cited by 39 publications

(30 citation statements)

References 40 publications

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“…This phenomenon was directly related to the compatibilization effect of SG- g -PLLA- g -PBAT through reactive blending. The detailed mechanism has been clarified in our previous work. − Very interestingly, the morphology of the DSB-blend changed from the sea-island structure to a co-continuous microstructure (Figure c1). Note that the major PLA phase in the DSB-blend was fully etched by acetonitrile, inferring that the continuity of the minor PBAT phase was close to 100%.…”

Section: Resultsmentioning

confidence: 74%

Stable Co-Continuous PLA/PBAT Blends Compatibilized by Interfacial Stereocomplex Crystallites: Toward Full Biodegradable Polymer Blends with Simultaneously Enhanced Mechanical Properties and Crystallization Rates

et al. 2021

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Constructing stable co-continuous morphology of commercial immiscible polymer blends remains an ongoing challenge in terms of complex presynthetic routes, multiple parameter dependency, and intrinsic instability of phase morphology. Herein, we demonstrate a full biodegradable polymer blend, poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate), where hitherto inaccessible co-continuous with asymmetric compositions (70/30) can be obtained with the assistance of interfacial stereocomplex crystallites (i-SCs) through reactive blending. By taking full advantages of this unprecedented compatibilizer, nanostructured co-continuous blends with synergistically enhanced comprehensive performance are achieved. First, due to the “rigid” i-SC, co-continuous morphology is induced through a simple melt blending procedure; second, considerable augmentation of the crystallization rate of the PLA matrix is accomplished on account of the in situ formed nucleation agent (i.e., i-SC); third, a super toughened material with simultaneously enhanced tensile strength, ductility, and impact strength can be acquired, resulting from the i-SC-induced co-continuous morphology; and fourth, i-SC can function as a “rigid” supporting layer between phases even above 200 °C, resulting in significantly enhanced morphology stability in melt. The versatile, facile, and practical strategy offers an industrially relevant technique to fabricate super-robust and fully biobased polymer materials.

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Section: Resultsmentioning

confidence: 74%

Stable Co-Continuous PLA/PBAT Blends Compatibilized by Interfacial Stereocomplex Crystallites: Toward Full Biodegradable Polymer Blends with Simultaneously Enhanced Mechanical Properties and Crystallization Rates

et al. 2021

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“…Undoubtedly, glycidyl methacrylate (GMA) is the most investigated and used monomer to obtain functional macromolecules with epoxy side groups, but other epoxide-containing monomers were also studied, such as 4-vinylphenyl glycidyl ether [ 22 ]. Previously, the copolymerization of GMA with numerous monomers, e.g., 3-methylthienyl methacrylate [ 23 ], trimethylolpropane trimethacrylate [ 24 ], sulfobetaine methacrylate [ 25 ], ethylene–methyl acrylate [ 26 ], styrene [ 27 , 28 ], 2-hydroxyethyl methacrylate [ 29 ], by various polymerization techniques, such as free radical polymerization, ATRP, NMP, RAFT, etc., was widely investigated. These functional materials were successfully applied for several purposes, for instance, medical devices [ 25 , 29 ], compatibilizing agent [ 26 ], and metal ion absorbers [ 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Thermoresponsive Poly(N,N-diethylacrylamide-co-glycidyl methacrylate) Copolymers and Its Catalytically Active α-Chymotrypsin Bioconjugate with Enhanced Enzyme Stability

et al. 2021

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Responsive (smart, intelligent, adaptive) polymers have been widely explored for a variety of advanced applications in recent years. The thermoresponsive poly(N,N-diethylacrylamide) (PDEAAm), which has a better biocompatibility than the widely investigated poly(N,N-isopropylacrylamide), has gained increased interest in recent years. In this paper, the successful synthesis, characterization, and bioconjugation of a novel thermoresponsive copolymer, poly(N,N-diethylacrylamide-co-glycidyl methacrylate) (P(DEAAm-co-GMA)), obtained by free radical copolymerization with various comonomer contents and monomer/initiator ratios are reported. It was found that all the investigated copolymers possess LCST-type thermoresponsive behavior with small extent of hysteresis, and the critical solution temperatures (CST), i.e., the cloud and clearing points, decrease linearly with increasing GMA content of these copolymers. The P(DEAAm-co-GMA) copolymer with pendant epoxy groups was found to conjugate efficiently with α-chymotrypsin in a direct, one-step reaction, leading to enzyme–polymer nanoparticle (EPNP) with average size of 56.9 nm. This EPNP also shows reversible thermoresponsive behavior with somewhat higher critical solution temperature than that of the unreacted P(DEAAm-co-GMA). Although the catalytic activity of the enzyme–polymer nanoconjugate is lower than that of the native enzyme, the results of the enzyme activity investigations prove that the pH and thermal stability of the enzyme is significantly enhanced by conjugation the with P(DEAAm-co-GMA) copolymer.

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“…Such as the more common two copolymer systems: [P(MMA-MAH)] and [P(ST-MAH)]. [9][10][11][12][13][14][15][16][17] Due to the introduction of cyclic rigid structure and the reactive groups of maleic anhydride, the thermal stability and reactivity of the copolymer significantly improved. The presence of polar anhydride groups makes them useful as modifiers to further embellish other materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel copolymer hybrid modifiers (MMA‐MAH‐MAPOSSandST‐MAH‐MAPOSS) based onPOSSnanoplatform and study on its thermal properties

Zhang

Guang

et al. 2021

Polymer Engineering & Sci

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Maleic anhydride is often used as a modifier to improve the thermal performance of the material due to its unique structure and properties. However, in order to meet higher demands, it is often imperative to have better heat resistance and thermal stability. Currently, the traditional method is physically blend inorganic nanoparticles to further improve thermal performance. Unfortunately, inorganic nanoparticles have a fatal problem in that they are not uniformly dispersed in the system, which severely limits their application. Here, we used organic–inorganic molecule, MAPOSS (methyl methacrylate‐based cage oligomeric silsesquioxane), to chemically modify the copolymer. And considering the unique structure of MAPOSS, we used two monomers with different polarities to study its influence on the thermal properties of the copolymerization system (MMA‐MAH‐MAPOSS and ST‐MAH‐MAPOSS), and discussed the interaction mechanism, respectively. As a result, MAPOSS introduced can not only be evenly distributed in the polymerization system via chemical bonding and physical interactions but also effectively improve the thermal stability and high‐temperature resistance of the polymers. Thereinto, the Tg of MMA‐MAH copolymer is increased to above 130°C, and the carbon residue rate is up to 7.3%. The carbon residue rate is increased to 15.6% without affecting the Tg of the ST‐MAH copolymer.

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Copolymers containing two types of reactive groups: New compatibilizer for immiscible PLLA/PA11 polymer blends

Cited by 39 publications

References 40 publications

Stable Co-Continuous PLA/PBAT Blends Compatibilized by Interfacial Stereocomplex Crystallites: Toward Full Biodegradable Polymer Blends with Simultaneously Enhanced Mechanical Properties and Crystallization Rates

Stable Co-Continuous PLA/PBAT Blends Compatibilized by Interfacial Stereocomplex Crystallites: Toward Full Biodegradable Polymer Blends with Simultaneously Enhanced Mechanical Properties and Crystallization Rates

Thermoresponsive Poly(N,N-diethylacrylamide-co-glycidyl methacrylate) Copolymers and Its Catalytically Active α-Chymotrypsin Bioconjugate with Enhanced Enzyme Stability

Synthesis of novel copolymer hybrid modifiers (MMA‐MAH‐MAPOSSandST‐MAH‐MAPOSS) based onPOSSnanoplatform and study on its thermal properties

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