Creation of novel polymer materials by processing with inclusion compounds

Huang, Lei; Gerber, Mark E.; Taylor, Hans P.; Lu, Jin; Tapaszi, E.; Wutkowski, M.; Hill, Marcus; Lewis, Christopher L.; Harvey, a Pierre D.; Herndon, April S.; Wei, Min; Rusa, Cristian C.; Tonelli, Alan E.

doi:10.1002/1521-3900(200112)176:1<129::aid-masy129>3.0.co;2-m

Cited by 21 publications

(25 citation statements)

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“…The materials used and the methods employed to observe them are fully described in refs. and in the subsequent references cited below.…”

Section: Methodsmentioning

confidence: 99%

“…We have employed a means for nano‐processing polymers into solid materials that exhibit unique properties. Non‐covalently bonded crystalline inclusion compounds (ICs) are initially formed between guest polymers and cyclodextrins (CDs) or urea (U) host molecules (see Figures and ) . Through careful removal of the host crystalline CD or U lattices (see Figure ), the guest polymer chains may be coalesced into bulk solid samples.…”

Section: Introductionmentioning

confidence: 99%

“…Non-covalently bonded crystalline inclusion compounds (ICs) are initially formed between guest polymers and cyclodextrins (CDs) or urea (U) host molecules (see Figures 1 and 2). [1][2][3][4][5][6] Through careful removal of the host crystalline CD or U lattices (see Figure 3), the guest polymer chains may be coalesced into bulk solid samples. CDs are known to form ICs with guest polymers that are included and reside in very narrow CD-IC channels (~0.5-1.0 nm in diameter) formed by their crystalline host lattice.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the melt crystallization of polymers, especially slow crystallizing polymers like PLLA and PET

Tonelli

2020

Polymer Crystallization

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Over 20 years ago we demonstrated that it is possible to control the melt crystallization of polymers via self‐nucleation. Non‐covalently bonded inclusion compounds (ICs) can be formed with cyclodextrins (CDs) or urea (U) when these small host molecules crystallize around guest polymers and form narrow parallel host channels, where the isolated and stretched guest polymer chains are included. Careful removal of the host crystalline lattice yields a neat coalesced (c) guest polymer sample with less entangled chains that are packed to a higher density than bulk samples of the same polymer obtained from its melt or solutions. Consequently, the reorganized c‐polymer samples behave distinctly, with higher glass‐transition temperatures for amorphous polymers and enhanced crystallizabilities for semi‐crystalline polymers. Remarkably, c‐polymer samples retain their distinct reorganized structures and behaviors even after extended periods of melt annealing. When a small amount of the rapidly crystallizable c‐polymer is homogeneously dispersed in a large quantity of the same as‐received (asr) polymer, and it is melted and then cooled, the c‐polymer chains crystallize first and nucleate the crystallization of the asr‐polymer chains, so that the entire sample (nuc‐polymer) crystallizes at nearly the same temperature as the neat nucleant (c‐polymer), including slow melt‐crystallizing polymers, such as PET and PLLA.

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“…The materials used and the methods employed to observe them are fully described in refs. and in the subsequent references cited below.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhancing the melt crystallization of polymers, especially slow crystallizing polymers like PLLA and PET

Tonelli

2020

Polymer Crystallization

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“…1c) to form long cylindrical channels in which, for example, guest polymer molecules can reside. [3][4][5][6][7][8][9][10] The a-CD cage structure has a Ôherring-boneÕ arrangement in which the cavity of each molecule is blocked by neighboring molecules. It is obtained upon recrystallization of a-CD from water.…”

Section: Introductionmentioning

confidence: 99%

Structure and stability of columnar cyclomaltohexaose (α-cyclodextrin) hydrate

Hunt

Rusa

Tonelli

et al. 2004

Carbohydrate Research

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“…During the past several years we have been forming crystalline inclusion compounds (ICs) between host cyclodextrins (CDs) and a wide variety of high‐molecular‐weight guest polymers 1–31. More recently we have formed CD–ICs containing two and even three different polymers 10, 21, 23, 24, 30.…”

Section: Introductionmentioning

confidence: 99%

Molecular mixing of incompatible polymers through formation of and coalescence from their common crystalline cyclodextrin inclusion compounds

Rusa

Wei

Shuai

et al. 2004

J Polym Sci B Polym Phys

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We describe the successful mixing of polymer pairs and triplets that are normally incompatible to form blends that possess molecular‐level homogeneity. This is achieved by the simultaneous formation of crystalline inclusion compounds (ICs) between host cyclodextrins (CDs) and two or more guest polymers, followed by coalescing the included guest polymers from their common CD–ICs to form blends. Several such CD–IC fabricated blends, including both polymer1/polymer2 binary and polymer1/ polymer2/polymer3 ternary blends, are described and examined by means of X‐ray diffraction, differential scanning calorimetry, thermogravimetric analysis, Fourier transform infrared spectroscopy, and solid‐state NMR to probe their levels of mixing. It is generally observed that homogeneous blends with a molecular‐level mixing of blend components is achieved, even when the blend components are normally immiscible by the usual solution and melt blending techniques. In addition, when block copolymers composed of inherently immiscible blocks are coalesced from their CD–ICs, significant suppression of their normal phase‐segregated morphologies generally occurs. Preliminary observations of the thermal and temporal stabilities of the CD–IC coalesced blends and block copolymers are reported, and CD–IC fabrication of polymer blends and reorganization of block copolymers are suggested as a potentially novel means to achieve a significant expansion of the range of useful polymer materials. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 4207–4224, 2004

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Creation of novel polymer materials by processing with inclusion compounds

Cited by 21 publications

References 0 publications

Enhancing the melt crystallization of polymers, especially slow crystallizing polymers like PLLA and PET

Enhancing the melt crystallization of polymers, especially slow crystallizing polymers like PLLA and PET

Structure and stability of columnar cyclomaltohexaose (α-cyclodextrin) hydrate

Molecular mixing of incompatible polymers through formation of and coalescence from their common crystalline cyclodextrin inclusion compounds

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