Structure of alternating cis- and trans-piperylene-maleic anhydride copolymers by 13C-NMR analysis

Gaylord, Norman G.; Nagler, Meshulam; Watterson, Arthur C.

doi:10.1016/0014-3057(83)90042-3

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…Six peaks were observed corresponding to carbon atoms in the unmodified PBSA (9) were observed in the spectra of composites containing PBSA-g-MA. These same features were observed in previous studies 29 and indicate grafting of MA onto PBSA. However, the peak at d ¼ 174.5 ppm (C¼ ¼O) (10) [Fig.…”

Section: Resultssupporting

confidence: 86%

Performance and biodegradability of a maleated polyester bioplastic/recycled sugarcane bagasse system

2011

J of Applied Polymer Sci

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The biodegradability, morphology, and mechanical properties of composite materials made of poly-(butylene succinate adipate) (PBSA) and sugarcane bagasse (SCB) were evaluated. Composites containing maleic anhydride (MA)-grafted PBSA (PBSA-g-MA/SCB) exhibited noticeably superior mechanical properties because of greater compatibility between the two components. The dispersion of SCB in the PBSA-g-MA matrix was highly homogeneous as a result of ester formation between the carboxyl groups of PBSA-g-MA and hydroxyl groups in SCB and the consequent creation of branched and crosslinked macromolecules. Each composite was subjected to biodegradation tests in a Rhizopus oryzae compost. Morphological observations indicated severe disruption of film structure after 60 days of incubation, and both the PBSA and the PBSA-g-MA/SCB composite films were eventually completely degraded. The PBSA-g-MA/SCB films were more biodegradable than those made of PBSA and exhibited a higher intrinsic viscosity, implying a strong connection between these characteristics and biodegradability.

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Section: Resultssupporting

confidence: 86%

Performance and biodegradability of a maleated polyester bioplastic/recycled sugarcane bagasse system

2011

J of Applied Polymer Sci

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“…These additional peaks were located at δ = 42.3 and 36.2 ppm. These same features were observed in previous studies and indicate grafting of MA onto PBSA. However, the peak at δ = 173.5 ppm (CO) (Figure B ), which is also typical for MA grafted onto PBSA, was absent in the solid-state PBSA- g -MA/starch spectrum (20 wt %).…”

Section: Resultssupporting

confidence: 90%

Promoting Fertilizer Use via Controlled Release of a Bacteria-Encapsulated Film Bag

Wu¹

2010

J. Agric. Food Chem.

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A phosphate-solubilizing bacterium ( Burkholderia cepacia isolate) encapsulated in maleic anhydride (MA) grafted onto poly(butylene succinate adipate) (PBSA) and then combined with starch as film bag material (PBSA-g-MA/starch) incubated in a saline solution required approximately 20 days to deplete the starch in the film bags. Thereafter, the cell concentration in the saline solution increased significantly because of the release of cells from the severely destroyed film bags and also their growth by use of depolymerized PBSA-g-MA fragments as a substrate. The incubation proceeded for 60 days, by which time the PBSA-g-MA/starch composite had suffered a >80% weight loss. For practical application, effectiveness of the above-mentioned film bags was demonstrated because it could improve the absorbability of a fertilizer for plants and promote the growth of plants. As a result, it can avoid the accumulation of the phosphate in excess fertilizer that lead to the phenomenon of poor soils. These results demonstrate that PBSA-g-MA/starch can be used to encapsulate cells of an indigenous phosphate-solubilizing bacterium ( B. cepacia isolate) to form a controlled release of bacteria-encapsulated film bag (BEFB). The B. cepacia isolate was able to degrade the film bags material, causing cell release. Biodegradability of the film bags depended upon the type of material used, because the PBSA film bags were also degraded but to a lesser degree. The addition of starch made the film bags more biodegradable. The decrease in intrinsic viscosity was also higher for the starch composite, suggesting a strong connection between the biodegradability and these characteristics. The results suggest that the release of fertilizer-promoted bacteria might be controllable via a suitable film bag material formulation. In addition, this work adopted live bacteria to promote the absorption of phosphate, which is superior to the phosphate used in the traditional way.

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“…The work done by Hall et al4, 5 showed that copolymers synthesized from maleic anhydride and conjugated olefins had regularly alternating chain morphologies. Work by Gaylord et al6, 7 has also shown that maleic anhydride olefin copolymers have regularly alternating chain structures. In addition, Smith and Kharas8 have reported that the tendency toward alternation increases as the polarity differences between the two monomers increases.…”

Section: Resultsmentioning

confidence: 98%

“…2(B)]. Integration of the appropriate resonance's (assignments in the Figure)5–7, 11 show a maleic anhydride content of 49–50% and that one of the double bonds of the Pamolyn 380 has been consumed. A 1 H‐NMR spectrum and a l3 C‐NMR spectrum of Pamolyn 380 have been included for comparison purposes [Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of copolymers of a linoleic acid derivative and properties of the copolymer films

Trumbo

Mote

Rasoul

2001

J. Appl. Polym. Sci.

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Addition copolymers of maleic anhydride and a commercially available conjugated fatty acid, Pamolyn 380, were synthesized via thermal initiation. The copolymers had moderately high molecular weights and were obtained in reasonable yields. The copolymers were characterized by nuclear magnetic resonance and infrared spectroscopy and by elemental analysis. Based on this analytical data and examples from the literature, the copolymers were assigned regularly alternating chain morphology. Coatings were formulated with the copolymers, and films over a metal substrate were evaluated. The films were found to have excellent solvent resistance, high hardness, and good gloss. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 261–267, 2001

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Structure of alternating cis- and trans-piperylene-maleic anhydride copolymers by 13C-NMR analysis

Cited by 7 publications

References 7 publications

Performance and biodegradability of a maleated polyester bioplastic/recycled sugarcane bagasse system

Performance and biodegradability of a maleated polyester bioplastic/recycled sugarcane bagasse system

Promoting Fertilizer Use via Controlled Release of a Bacteria-Encapsulated Film Bag

Synthesis of copolymers of a linoleic acid derivative and properties of the copolymer films

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