Hyperbranched polyester polyol plasticized tapioca starch/low density polyethylene blends

Guzman, Manuel Reyes De; Vásquez, Diego Hernán Giraldo; Murillo, Edwin A.

doi:10.1590/0104-1428.04816

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…Dobiveni rezultati ukazuju na to da se postupkom plastifikacije prirodnog pšeničnog škroba izrazito poboljšava toplinska stabilnost, važna za njegovo procesiranje i preradu, kao potencijalnog materijala za moguću primjenu kao ambalažnog materijala. 23,24 Daljnji proces razgradnje prirodnog pšeničnog škroba i TPS-a (slika 2) vidljiv je u temperaturnom području 270 -330 °C, u kojem dolazi do glavne razgradnje škroba (m 1 = 84,5 % kod TPS-a), s pomakom prema višim temperaturama za TPS. Udio ostatka pri 700 °C iznosi od 10 do 14 % i vezan je za udio prisutnih anorganskih nečistoća koje su se vezale na škrob.…”

Section: Uzorak Sampleunclassified

Toplinska i mehanička svojstva mješavina na bazi termoplastičnog škroba

2018

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U ovom radu pripremljene su mješavine na osnovi polietilena niske gustoće (PE-LD) i termoplastičnog škroba (TPS) s ciljem dobivanja biorazgradljivog polimernog materijala za primjenu kao ambalažnog materijala. Provedena je karakterizacija toplinskih, mehaničkih svojstava kao i propusnost vodene pare zbog izrazitog hidrofilnog karaktera škroba. Dodatak TPS-a u PE-LD/TPS mješavinama utječe na porast stupnja kristalnosti do udjela od 20 mas. % zbog nukleacijskog učinka TPS-a. Prekidno naprezanje i prekidno istezanje smanjuju se porastom udjela TPS-a u PE-LD/TPS mješavinama, dok modul elastičnosti raste. Temperatura početka razgradnje pomiče se na niže temperature, što ukazuje na smanjenje toplinske stabilnosti PE-LD-a dodatkom TPS-a. Glicerol kao plastifikator škroba utječe na povećanje toplinske stabilnosti škroba, no pokazuje negativan učinak na propusnost vodene pare.Biorazgradljivi materijali, polietilen niske gustoće, termoplastični škrob, toplinska svojstva, mehanička svojstva, propusnost vodene pare

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Section: Uzorak Sampleunclassified

Toplinska i mehanička svojstva mješavina na bazi termoplastičnog škroba

2018

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“…Thus, HBPETs are expected to have better starch plasticizing effects. Because of the higher molecular weight, more branches and multifunctional characteristics, HBPETs have better compatibility with the matrix and a higher resistance to migration than linear polyesters and small molecules . Therefore HBPET‐plasticized starch has important theoretical and practical significance.…”

Section: Introductionmentioning

confidence: 99%

Poly(citrate glyceride): a hyperbranched polyester for starch plasticization

Zhang

Cheng

et al. 2018

Polymer International

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Hyperbranched polyesters (HBPETs), terminated with either hydroxyl or carboxyl groups, were prepared from citric acid and glycerol in simple one-step syntheses. The HBPET structure and degree of branching were investigated using Fourier transform infrared and 1 H NMR spectroscopies and gel permeation chromatography. The HBPET plasticizers were combined with a maize starch via cooking and film formation. The mechanical, thermal, paste and structural properties of the plasticized starch composites were studied in detail using differential scanning calorimetry, thermogravimetric analysis, rapid viscosity analysis and X-ray diffraction. The HBPETs reduced the pasting viscosity but slightly increased the pasting temperature of the starch. The smaller breakdown and setback values of the plasticized starch pastes relative to those of native starch suggested weaker retrogradation. Compared with glycerol/starch plasticized films, HBPET/starch composite films had lower crystallinity, lower glass transition temperature and better mechanical and thermal properties. The properties of the plasticized starch samples strongly depended on the terminal groups and the molecular weight of the HBPET plasticizers.

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Blending of phthalated starch and surface functionalized rice husk extracted nanosilica with LDPE towards developing an efficient packaging substitute

Datta

Halder

2019

Environ Sci Pollut Res

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Hyperbranched polyester polyol plasticized tapioca starch/low density polyethylene blends

Cited by 8 publications

References 22 publications

Toplinska i mehanička svojstva mješavina na bazi termoplastičnog škroba

Toplinska i mehanička svojstva mješavina na bazi termoplastičnog škroba

Poly(citrate glyceride): a hyperbranched polyester for starch plasticization

Blending of phthalated starch and surface functionalized rice husk extracted nanosilica with LDPE towards developing an efficient packaging substitute

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