Preparation, characterization, and water resistance of cationic acetylated starch‐<i>g</i>‐poly(styrene‐butyl acrylate) surfactant‐free emulsion

Mou, Junmin; Li, Xiaorui; Wang, Haihua; Fei, Guiqiang; Liu, Qin

doi:10.1002/star.201200041

Cited by 35 publications

(28 citation statements)

References 28 publications

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“…The precipitate was dried under vacuum at 40°C until constant weight was achieved. The pure OS-g-P(St-BA) was obtained by removing the ungrafted copolymers [PSt, PBA, or P(St-BA)] by Soxhlet extraction using acetone for 24 h [15]. The percentage of graft (PG) and grafting efficiency (GE) were calculated using the following equations [16]:…”

Section: Determination Of the Graft Level Of Os-g-p(st-ba) Latexmentioning

confidence: 99%

Preparation and characterization of oxidized starch-graft-poly(styrene-butyl acrylate) latex via emulsion polymerization

Cheng

2014

Journal of Polymer Engineering

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Oxidized starch-graft-poly(styrene-butyl acrylate) [OS-g-P(St-BA)] latex was synthesized by the graft co polymerization of OS with St and n-butyl acrylate (BA) via emulsion polymerization. The graft copolymers were characterized by Fourier transform infrared (FT-IR), transmission electronic microscopy (TEM), dynamic light scattering, thermogravimetry (TG), and differential scanning calorimetry (DSC). The effects of the amount of OS, monomers, and initiator on graft copolymerization were investigated. Under the optimal conditions, the percentage of graft (PG), grafting efficiency (GE), and ζ potential could reach 256.5%, 41.7%, and -30.1 mV, respectively. The results indicated that the OS grafted onto particles greatly enhanced the colloidal stability of latex. The thermal stability properties of OS-g-P(St-BA) were also improved by the addition of OS. The OS-g-P(St-BA) latex may be used to partly replace the conventional synthetic latex for paper coating.

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Section: Determination Of the Graft Level Of Os-g-p(st-ba) Latexmentioning

confidence: 99%

Preparation and characterization of oxidized starch-graft-poly(styrene-butyl acrylate) latex via emulsion polymerization

Cheng

2014

Journal of Polymer Engineering

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“…Kalemljenje je ispitivano sa različitim masenim odnosom monomera [169], na različitim reakcionim temperaturama, sa različitom količinom inicijatora i sa različitim vrstama SK (SK modifikovan poli(akrilonitrilom) [170], SK modifikovan acetaldehidom [171]). TakoĎe, ozon je korišćen kao inicijator u reakciji kalemljenja poli(stiren-co-n-butil-akrilat) lateksa na SK [172].…”

Section: Kalemljeni Kopolimeri Polistirena I Prirodnih Polimeraunclassified

“…Prilikom ove reakcije dolazi i do stvaranja slobodnog radikala na molekulu monomera. Slobodni radikal na monomeru, zatim, napada nove molekule monomera, što vodi produţavanju lanca PS vezanog za SK [155,171]. Reakcija propagacije se moţe prikazati Shemom 3.5.,…”

Section: Reakcija Propagacijeunclassified

“…Ova reakcija se moţe prekinuti reakcijom rastućeg lanca sa inicijatorom (radikalom koji nastaje u reakciji inicijacije), reakcijom kuplovanja ili disproporcije [169,170,171]. Reakcije terminacije su prikazane na Shemi 3.6..…”

Section: Reakcija Terminacijeunclassified

“…Ovaj makroradikal dalje napada nove monomere MKK dajući kalemljeni kopolimer PMKK i SK [155,171]. Prikaz reakcije propagacije dat je na Shemi 3.12..…”

Section: Reakcija Propagacijeunclassified

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Copolumers obtained by grafting of vinyl monomers on starch - influence of amines on synthesis and degradation processes in environment

Nikolić¹

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Synthesis, characterization, and properties of PCDL aliphatic hyperbranched polyurethane coatings

Wang

Guo

et al. 2013

J of Applied Polymer Sci

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The isocyanate-terminated polyurethane pre-polymer (PPU) was synthesized via the step-growth polymerization approach by using polycarbonate diol (PCDL, Mn 5 2000) and isophorone disocyanate (IPDI) as monomers, dibutyltin dilaurate (DBTDL) as the catalyst. Subsequently, the hyperbranched polyurethane (HBPU) was synthesized by graft copolymerization using PPU, hyperbranched poly(amide-ester) polyol (HPAE) and 1,4-butanediol (BDO). The molecular structure of HBPU was characterized by means of FTIR, 1 H-NMR, and 13 C-NMR. It was observed that HBPU was synthesized as anticipated. The thermal and mechanical properties, the microstructure, and morphologies of the filmed HBPU and LPU (linear polyurethane) were tested, respectively. The filmed HBPU, revealed better thermal stability, and higher T g accompanied with lower viscosity than those of filmed LPU. Additionally, the mechanical experiment showed that the filmed HBPU exhibited enhanced mechanical properties because it contained certain amounts of HPAE. Compared with its linear analog (LPU) specimen, the tensile strength of the filmed HBPU containing 10 wt % HPAE increased by 1.9 times (up to 28.15 MPa), and its elongation at break increased by 1.5 times (up to 543.8%), resulting from the dual effects of the hydrogen bonding and the crosslinking density in the HBPU system. The morphologies of filmed HBPU were characterized by means of WAXD and SEM, which indicated that increasing the content of HPAE lowers the crystallinity of HBPU.Recently, a lot of studies on the application of hyperbranched polymers in PU field have been reported. A series of morphology hyperbranched polyurethane (HB-PU) and hyperbranched shape memory polyurethane (HB-SMPU) has been prepared by Cao and co-workers, 15-18 they found that hard segment content has a significant influence on the properties of PU. Okrasa and co-workers 19,20 studied the molecular dynamics in polyurethane network and molecular relaxations synthesized by hyperbranched polyesters (trade name Boltorn V R ). They found that the macrobiol length had a strong influence on the glass transition and the a-relaxation process correlated with it. Sheth and co-workers 21 observed the structure-property behavior of highly branched pre-polymer (PPU) and its linear analog synthesized with bis (4-isocyanatocyclohexyl) methane and polyether polyol, etc. They drew the conclusion that the tensile strength of the highly branched PPU was lower than that of the linear analog synthesized. The tensile tests of hyperbranched aqueous poly(urethane-urea) (HBAPU) by Liu et al. 22,23 revealed that HBAPU exhibited excellent tensile properties, maximum tensile strength, and higher T g accompanied with lower viscosity.

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Preparation, characterization, and water resistance of cationic acetylated starch‐g‐poly(styrene‐butyl acrylate) surfactant‐free emulsion

Cited by 35 publications

References 28 publications

Preparation and characterization of oxidized starch-graft-poly(styrene-butyl acrylate) latex via emulsion polymerization

Preparation and characterization of oxidized starch-graft-poly(styrene-butyl acrylate) latex via emulsion polymerization

Copolumers obtained by grafting of vinyl monomers on starch - influence of amines on synthesis and degradation processes in environment

Synthesis, characterization, and properties of PCDL aliphatic hyperbranched polyurethane coatings

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