Ll, the methacrylic acid/cellulose 1/2 v/w, as well as the employed to
Ll, the methacrylic acid/cellulose 1/2 v/w, plus the made use of to dissolve thewas 10-2 mol/L relating to MA volume. Subsequent, all com-2 ratio was 1/2 v/w, and the AIBN concentration was reflux for 4h. The modified volume. ponents were mixed together and permitted to react beneath ten mol/L with regards to MAcelNext, all elements had been mixed with each other and permitted to react under the prior luloses had been washed with distilled water, freeze-dried, and milled, equivalent toreflux for four h. The modified celluloses acid-modified celluloses, MC-SIV-MA and MC-SIMA-MA, have been step. Polymethacrylic have been washed with distilled water, freeze-dried, and milled, similar to obtained. Figure 1 Polymethacrylic acid-modified celluloses, MC-SIV-MA and thusthe prior step.presents the reaction schemes for the MA graft polymerization on MCSIMA-MA, silanized celluloses. the surface of were thus obtained. Figure 1 presents the reaction schemes for the MA graft polymerization around the surface of silanized celluloses. two.5. Preparation on the PHB/Modified Cellulose Composite Films two.5.The composite the PHB/Modified Cellulose Compositeand modified celluloses (two wt ) Preparation of films had been ready by mixing PHB Films inside a 30The3 composite mixing chamber(Brabender GmbH Co. KG, Duisburg, Germany) wt ) cm Brabender films had been ready by mixing PHB and modified celluloses (2 in a for Brabender mixing molding on a two-rollmill to receive sheets. These Germany) at 16530 cm3 7 min, followed by chamber(Brabender GmbH Co. KG, Duisburg, were at 165 C for 7 min, followed P200E press (Dr. two-rollmill to receive sheets. These further compression-molded in aby molding on a Safranin MedChemExpress Collin, Ebersberg, Germany) at 175 had been with 120 s of preheating at 0.5 MPaa P200Espress (Dr. Collin, Ebersberg,cooling cassette C additional compression-molded in and 60 of compression at ten MPa. A Germany) at 175 accessory was applied for the at 0.5 MPa and 60 s films. with 120 s of preheating speedy cooling from the of compression at ten MPa. A cooling cassette accessory was used for the rapid cooling of the films.Polymers 2021, 13,5 of2.six. Characterization two.6.1. Fourier Transform Infrared Spectroscopy The FTIR attenuated total reflectance (ATR) analysis was carried out on a JASCO 6300 spectrophotometer (JASCO International Co., Ltd., Tokyo, Japan) equipped with a Specac ATR Golden Gate unit (Specac, Inc., Orpington, UK) with KRS5 lens. FTIR spectra have been scanned from 4000 to 400 cm-1 , with 32 scans per spectrum at a resolution of four cm-1 . 2.6.two. Thermogravimetric Analysis Original and differently modified MCs and also the composites containing these fibers had been characterized by TGA making use of a TA-Q5000 (TA Instruments, New Castle, DE, USA). Measurements have been carried out on samples of 80 mg from area temperature to 700 C with ten C/min in nitrogen atmosphere purged with 40 mL/min. two.six.three. Differential Scanning Calorimetry (DSC) Calorimetric measurements have been carried out on a DSC Q2000 from TA Instruments (New Castle, DE, USA) beneath a helium flow of 25 mL/min utilizing 103 mg from every Alvelestat Technical Information single sample and also a heating/cooling rate of ten C/min through cycles. The applied system involved: a rapid cooling in the ambient temperature to -60 C, equilibration for 2 min at this temperature, heating to 200 C (initial heating cycle), equilibration for two min, cooling to -60 C (cooling cycle), equilibration for two min and heating again to 200 C (second heating cycle). The crystallinity (Xc ) was calculated in the second heating cycle with: Xc = H one hundred H0 w PHB (.
