Synthesis and characterization of alkali‐soluble photosensitive polysiloxane urethane acrylate

Wang

et al. 2019

Polymer International

A series of hyperbranched poly(citric polyethylene glycol) (PCPEG) materials with varied polyethylene glycol (PEG) chain lengths as plasticizers were mixed with maize starch (MS) via cooking and film‐forming. The structure, pasting property, plasticization, aging property, moisture absorption and compatibility of plasticized starches were studied by means of Fourier transform infrared spectroscopy, X‐ray diffraction, rapid viscosity analysis, tension testing, moisture absorption measurements and scanning electron microscopy. Compared with PEG and citric acid, PCPEG was more effective in promoting starch chain movement and inhibiting the retrogradation of starch film. Also, PCPEG/MS had smaller moisture content. The longer the plasticizer chain, the better were the aging resistance and moisture resistance of starch. But with an increase of PEG chain length, mechanical properties of PCPEG/MS deteriorated and the compatibility between PCPEG and MS decreased. The hyperbranched derivative of PEG with longer chain exhibited improved plasticization and compatibility with starch. © 2019 Society of Chemical Industry

Section: Introductionmentioning

confidence: 98%

Effect of hyperbranched poly(citric polyethylene glycol) with various polyethylene glycol chain lengths on starch plasticization and retrogradation

Wang

et al. 2019

Polymer International

“…Therefore, hyperbranched polyesters are widely used in coatings, polymer blending modification, biological materials, and drug carriers . For plasticization, the properties of hyperbranched polyesters, such as their larger molecular weights, high number of branches, and more multifunctional groups, make their compatibility with host polymers and resistance to migration better than those of linear and small plasticizers . Additionally, hyperbranched polyesters can be synthesized by a simple one‐pot method that can be tailored by changing the recipes or procedures to meet certain requirements.…”

Section: Introductionmentioning

confidence: 99%

Aging properties and hydrophilicity of maize starch plasticized by hyperbranched poly(citrate glyceride)

J of Applied Polymer Sci

Cheng

et al. 2018

Hyperbranched poly(citrate glyceride)s (HBPETs) as plasticizers were mixed with maize starch (S) via cooking and film formation. The structure, aging properties, and hydrophilicity of the plasticized starches were studied by means of Fourier transform infrared spectroscopy, X‐ray diffraction, tension testing, contact angle testing, solubility measurements, moisture absorption, and water vapor permeability (WVP). Compared with a glycerol–S plasticized film, the HBPET–S composite films had better mechanical properties in terms of both strength and elongation at break, better aging resistance, less moisture absorption, less WVP, and more hydrophobicity on the film surface. The mechanisms behind the performances resulted from stronger and more stable H bonds between the abundant active end groups of HBPET and hydroxyls of starch and the high branching degree of the HBPETs; this was helpful for effectively inhibiting the recrystallization of starch. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46899.

“…AHBPSUA with these properties has potential application in solder resist ink. 16 The molecular structure of HBPÀOH was shown in Scheme 1. The degree of branching of HB 1 PÀOH, HB 2 PÀOH, and HB 3 PÀOH is 6, 12, and 24, respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Alkali-Soluble Hyperbranched Photosensitive Polysiloxane Urethane Acrylate

Sun

Liu

et al. 2011

Ind. Eng. Chem. Res.

Self Cite

A novel alkali-soluble hyperbranched photosensitive polysiloxane urethane acrylate (AHBPSUA) was synthesized by using hyperbranched polyesters, hydroxyl-terminated polysiloxane, dimethylolpropionic acid, isophorone diisocyanate, and 2-hydroxyethyl acrylate as raw materials, and its structure was characterized by Fourier transform infrared spectroscopy, gel permeation chromatography, and 1 H nuclear magnetic resonance spectroscopy. It was found that AHBPSUA possessed good compatibility with a number of acrylate monomers. The effect of photoinitiators and monomers on the photopolymerization kinetics of AHBPSUA was investigated by real-time infrared spectroscopy (RT-IR). The results showed that AHBPSUA could rapidly photopolymerize under UV irradiation in the presence of a photoinitiator and the optimal concentration of the photoinitiator (Darocur 1173) was determined as 0.1 wt %. The resin of AHBPSUA with common acrylic monomers exhibited a high polymerization rate and double-bond conversion and could form a regular image under UV irradiation through a patterned mask. The AHBPSUA system could dissolve in 1 wt % sodium carbonate solution easily and completely, and the cured coating film of the AHBPSUA system possessed excellent flexibility, toughness, and heat resistance.