Complexes of starch polysaccharides and poly(ethylene co‐acrylic acid): Structure and stability in solution

Shogren, Randal L.; Greene, Richard V.; Wu, Yufeng

doi:10.1002/app.1991.070420625

Cited by 96 publications

(48 citation statements)

References 25 publications

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“…[1][2][3][4][5][6][7] However, only limited research has been reported regarding the formation of inclusion complexes between amylose and polymeric compounds. [8][9][10][11][12][13][14] Amylose in solid-state constructs stabilized crystalline structures associated with the formation of double helixes. 15 In addition, single-stranded amylose in an aqueous solution gradually forms a double helix, resulting in a water-insoluble product.…”

Section: Introductionmentioning

confidence: 99%

Preparation of inclusion complexes composed of amylose and biodegradable poly(glycolic acid-co-ɛ-caprolactone) by vine-twining polymerization and their lipase-catalyzed hydrolysis behavior

Nomura

Kyutoku

Shimomura

et al. 2011

Polym J

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In this study, we found that amylose-poly(glycolic acid-co-e-caprolactone) (P(GA-co-CL)) inclusion complexes were formed when phosphorylase-catalyzed enzymatic polymerization was performed in the presence of biodegradable P(GA-co-CL)s according to a vine-twining polymerization process. The X-ray diffraction patterns of the products showed the typical diffraction peaks due to inclusion complexes composed of amylose and guest compounds. In addition, the 1 H NMR spectra of the products showed the signals due to amylose and P(GA-co-CL), in spite of washing with good solvents for P(GA-co-CL), such as acetone and chloroform. These results suggested that the products were inclusion complexes composed of amylose and P(GA-co-CL). The compositional ratio of GA unit to CL unit in P(GA-co-CL)s did not affect the inclusion behavior of amylose. On the other hand, the results in the vine-twining polymerization using amorphous P(GA-co-CL)s and a crystalline poly(glycolic acid-block-ecaprolactone) (P(GA-b-CL)) as guest polymers indicated that the crystallinity of the guest copolymers strongly affected the formation of inclusion complexes with amylose. In addition, we found that lipase-catalyzed hydrolysis of P(GA-co-CL) in the inclusion complex was partly inhibited, probably because amylose, which surrounded P(GA-co-CL), prevented the approach of lipase.

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Section: Introductionmentioning

confidence: 99%

Preparation of inclusion complexes composed of amylose and biodegradable poly(glycolic acid-co-ɛ-caprolactone) by vine-twining polymerization and their lipase-catalyzed hydrolysis behavior

Nomura

Kyutoku

Shimomura

et al. 2011

Polym J

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“…Therefore, hydrophobicity is required as the property of guest molecules to be included by amylose. However, only limited studies had been reported regarding the formation of inclusion complexes composed of amylose and polymeric guest molecules [23][24][25][26][27][28][29]. Because the driving force incorporating guest molecules into the cavity of amylose is the weak hydrophobic interaction, amylose does not have sufficient ability to include the long chains of polymeric guests into its cavity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Applications of Amylose Supramolecules by Means of Phosphorylase-Catalyzed Enzymatic Polymerization

Kadokawa

2012

Polymers

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This paper reviews preparation and applications of amylose supramolecules by means of phosphorylase-catalyzed enzymatic polymerization. When the enzymatic polymerization of α-D-glucose 1-phosphate (G-1-P) as a monomer was carried out in the presence of poly(tetrahydrofuran) (PTHF) of a hydrophobic polyether as a guest polymer, the supramolecule, i.e., an amylose-PTHF inclusion complex, was formed in the process of polymerization. Because the representation of propagation in the polymerization is similar to the way that vines of plants grow twining around rods, this polymerization method for the preparation of amylose-polymer inclusion complexes was proposed to be named -vine-twining polymerization‖. Various hydrophobic polyethers, polyesters, poly(ester-ether), and polycarbonates were also employed as the guest polymer in the vine-twining polymerization to produce the corresponding inclusion complexes. To obtain the inclusion complex from a strongly hydrophobic guest polymer, the parallel enzymatic polymerization system was developed as an advanced extension of the vine-twining polymerization. In addition, it was found that amylose selectively includes one side of the guest polymer from a mixture of two resemblant guest polymers, as well as a specific range in molecular weights of the guest PTHF. Amylose also exhibited selective inclusion behavior toward stereoisomers of poly(lactide)s. Moreover, the preparation of hydrogels through the formation of inclusion complexes of amylose in vine-twining polymerization was achieved.

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“…Later, Fanta et al [14] and Shogren et al [15] reported that the carboxylic groups of ethylene-acrylic acid (EAA) could form V-type complexes with starch leading to better mechanical properties of blends at higher loadings.…”

Section: Introductionmentioning

confidence: 98%

The role of joint viscoelastic function in the adhesion of low-density polyethylene to thermoplastic starch

Mohammadi

Ghaffarian

2007

Journal of Adhesion Science and Technology

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Measured adhesion energies of low-density polyethylene (LDPE) to thermoplastic starch (TPS) joint and of joints in presence of poly(ethylene-co-vinyl acetate) (EVA), polyethylene grafted with maleic anhydride (PE-g-MAH) and styrene-ethylene-butadiene-styrene grafted with maleic anhydride (SEBS-g-MAH) compatibilizers were investigated. The compatibilizers were introduced to the interface via their pre-mixing with the adherend (PE) or adhesive (TPS). The results showed adhesion energy improvement from 41 J/m 2 for PE/TPS to 118, 151 and 272 J/m 2 by adding 3.3 wt% of EVA, SEBS-g-MAH and PE-g-MAH to the PE adherend, respectively. On the other hand, by raising the compatibilizers to 5.75 wt%, similar joint adhesion energies of about 250 J/m 2 were found for all studied systems. The measured adhesion energy increments were attributed to the migration of the compatibilizers to the interface during high temperature joint preparation. In addition, the observed efficacies of various compatibilizers were ascribed to their interfacial stress transfer capabilities. Joint viscoelastic function, i.e., joint adhesion energy divided by its thermodynamic work of adhesion, showed similar dependence on adherend tan δ divided by the adhesive tan δ (A) divided by the compatibilizer tan δ as the measured adhesion energy. This interesting finding supports the hypothesis that the main viscoelastic loss effects in joints with stiff adherends are localized in the interphase adjacent to the crack tip.

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Complexes of starch polysaccharides and poly(ethylene co‐acrylic acid): Structure and stability in solution

Cited by 96 publications

References 25 publications

Preparation of inclusion complexes composed of amylose and biodegradable poly(glycolic acid-co-ɛ-caprolactone) by vine-twining polymerization and their lipase-catalyzed hydrolysis behavior

Preparation of inclusion complexes composed of amylose and biodegradable poly(glycolic acid-co-ɛ-caprolactone) by vine-twining polymerization and their lipase-catalyzed hydrolysis behavior

Preparation and Applications of Amylose Supramolecules by Means of Phosphorylase-Catalyzed Enzymatic Polymerization

The role of joint viscoelastic function in the adhesion of low-density polyethylene to thermoplastic starch

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