Deacetylation behavior of binary blend films of cellulose acetate and various polymers

2006 ◽  
Vol 100 (3) ◽  
pp. 1816-1823 ◽  
Author(s):  
Yoichiro Yamashita ◽  
Takeshi Endo
Keyword(s):  
Cellulose Acetate ◽  
Binary Blend ◽  
Blend Films

Novel Three-Component Blends Based on Poly(L-Lactide)

2008 ◽  
Vol 55-57 ◽  
pp. 737-740
Author(s):  
S. Juikham ◽  
A.J. Amass ◽  
B.J. Tighe
Keyword(s):  
Cellulose Acetate ◽  
Blend Films ◽  
Immiscible Blends ◽  
Miscible Blends ◽  
Plate Reader ◽  
Multi Wavelength ◽  
Uv Visible ◽  
Phase Compatibility ◽  
Diol Polyester ◽  
Acetate Butyrate

A significant number of poly a-ester homologues of poly(L-lactide) (PLLA) have been synthesized and used in miscibility studies together with conventional isomeric diacid-diol polyester variants, poly β-esters (based on β-hydroxybutyrate (HB) and β-hydroxyvalerate (HV)), poly e-caprolactone (PCL), poly e-caprolactone copolymers (e.g. poly(L-lactide-co-caprolactone), and a series of cellulose-based polymers (e.g. cellulose acetate butyrate (CAB), cellulose acetate propionate (CAP)). A combinatorial approach to rapid miscibility screening using 96-well plates and a uv-visible multi-wavelength plate reader has been developed enabling the clarity of PLLA-based multi-component blend films to be observed. Using these techniques and materials, the ternary phase compatibility diagrams of a range of three-component blend films was prepared, illustrating ranges of behavior varying from miscible blends giving rise to clear films to immiscible blends which are opaque. In this way, novel three-component blends of PLLA/CAB/PCL were developed which are miscible when the CAB content is more than 30%, PLLA less than 80% and PCL less than 60%.

Transient currents in discharge mode in cellulose acetate: polyvinyl acetate blend films

Pramana ◽  
1995 ◽  
Vol 44 (1) ◽  
pp. 9-18 ◽  
Author(s):  
P K Khare ◽  
R S Chandok ◽  
A P Srivastava
Keyword(s):  
Cellulose Acetate ◽  
Polyvinyl Acetate ◽  
Transient Currents ◽  
Discharge Mode ◽  
Blend Films

scholarly journals Compatibilization and Toughening of Biodegradable Poly (Lactic Acid) / Cellulose Acetate Films by Polyamide Amine Dendrimers

2021 ◽  
Author(s):  
Yansong Huang ◽  
Yu juan Jin ◽  
Bo Wang ◽  
Huafeng Tian ◽  
Yunxuan Weng ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Oxygen Permeability ◽  
Pamam Dendrimer ◽  
Poly Lactic Acid ◽  
Test Results ◽  
Excellent Performance ◽  
Blend Films ◽  
Biodegradable Poly ◽  
Green Packaging ◽  
Overall Performance

Abstract Due to the poor compatibility caused by the large difference in hydrophilicity and interface between polylactic acid (PLA) and cellulose acetate (CA), the blending of the two materials is difficult and the application is limited. To solve this problem, a type of polyamide amine (PAMAM) dendrimer was introduced to modify PLA / CA blends in this work. The results showed that PAMAM could improve the compatibility of PLA / CA blends, promote the distribution of CA and crystallization of PLA. At the same time, adding PAMAM could enhance the mechanical properties of the blend material, and the toughness and tear strength were increased by 551% and 141%, respectively. In addition, the incorporation of PAMAM increased hydrophobicity and oxygen permeability of PLA/ CA blends, and the oxygen permeability could be increased by up to 3 orders of magnitude. Degradation test results showed that the blend exhibited good biodegradability. The overall performance of the PLA/ CA blend film was optimal when the content of PAMAM was 3 phr. The biodegradable blend films with excellent performance provided wide application prospect in the food green packaging fields.

Effect of Triacetin on the Properties of Cellulose Acetate/Polyethylene Glycol Blend Films

2013 ◽  
Vol 50 (3) ◽  
pp. 200-207
Author(s):  
Young Min Seo ◽  
Hae Sung Lee ◽  
Sung Jun Lee ◽  
Sang Won Jung ◽  
Hyun-Chul Kim ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Cellulose Acetate ◽  
Blend Films

Delayed Luminescence Spectroscopy of Organic Photovoltaic Binary Blend Films: Probing the Emissive Non-geminate Charge Recombination

2010 ◽  
Vol 22 (45) ◽  
pp. 5183-5187 ◽  
Author(s):  
Panagiotis E. Keivanidis ◽  
Valentin Kamm ◽  
Clare Dyer-Smith ◽  
Weimin Zhang ◽  
Frédéric Laquai ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Organic Photovoltaic ◽  
Luminescence Spectroscopy ◽  
Delayed Luminescence ◽  
Binary Blend ◽  
Blend Films

Morphology and biodegradability of a binary blend of poly((R)-3-hydroxybutyric acid) and poly((R,S)-lactic acid)

1995 ◽  
Vol 41 (13) ◽  
pp. 316-322 ◽  
Author(s):  
Naoyuki Koyama ◽  
Yoshiharu Doi
Keyword(s):  
Differential Scanning Calorimetry ◽  
Lactic Acid ◽  
Enzymatic Hydrolysis ◽  
Potassium Phosphate ◽  
Hydroxybutyric Acid ◽  
Potassium Phosphate Buffer ◽  
Scanning Calorimetry ◽  
Binary Blend ◽  
Blend Films ◽  
Hydrolysis Of

The miscibility, morphology, and biodegradability of a binary blend of bacterial poly((R)-3-hydroxybutyric acid) (P((R)-3HB); Mn = 300 000) with atactic poly((R,S)-lactic acid) (P((R,S)-LA); Mn = 9000) were studied by means of differential scanning calorimetry, optical microscopy, scanning electron microscopy, and hydrolysis with and without enzyme. Differential scanning calorimetry revealed that a P((R)-3HB)–P((R,S)-LA) blend had a single glass-transition temperature for all proportions of the components. The spherulites of P((R)-3HB) were volume filled in the blend films, indicating the inclusion of amorphous P((R,S)-LA) within the spherulites. The spherulitic growth rate decreased with an increase in the content of P((R,S)-LA). These results indicate that the P((R)-3HB)–P((R,S)-LA) blend is miscible in the melt and in the amorphous state. The enzymatic hydrolysis of P((R)-3HB)–P((R,S)-LA) blend films was carried out at 37 °C for 19 h in 0.1 M potassium phosphate buffer (pH 7.4) with an extracellular poly(hydroxybutyrate) depolymerase from Alcaligenes faecalis T1. The rate of enzymatic surface erosion decreased with increasing P((R,S)-LA) content in the blend films. The simple hydrolysis of P((R)-3HB)–P((R,S)-LA) blend films without enzyme was also conducted at 37 °C in a 0.01 M potassium phosphate buffer (pH 7.4) for 150 days. The hydrolytic scission of P((R)-3HB) polymer chains was accelerated by blending with P((R,S)-LA). However, the rate of enzymatic hydrolysis was much faster than the rate of nonenzymatic hydrolysis.Key words: poly((R)-3-hydroxybutyric acid), poly((R,S)-lactic acid), miscibility, morphology, biodegradability.

Fabrication of cellulose acetate/chitosan blend films as efficient adsorbent for anionic water pollutants

2018 ◽  
Vol 76 (3) ◽  
pp. 1557-1571 ◽  
Author(s):  
Sreerag Gopi ◽  
Anitha Pius ◽  
Rupert Kargl ◽  
Karin Stana Kleinschek ◽  
Sabu Thomas
Keyword(s):  
Cellulose Acetate ◽  
Water Pollutants ◽  
Blend Films ◽  
Efficient Adsorbent
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