Study on the nonisothermal crystallization behavior of poly(vinyl alcohol)/attapulgite nanocomposites by DSC analysis

2005 ◽  
Vol 44 (3) ◽  
pp. 534-540 ◽  
Author(s):  
Zhiqin Peng ◽  
Dajun Chen
Keyword(s):  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Poly Vinyl Alcohol ◽  
Dsc Analysis ◽  
Nonisothermal Crystallization

Miscibility and isothermal crystallization behavior of polyamide 6/poly(vinyl alcohol) blend

2008 ◽  
Vol 46 (13) ◽  
pp. 1360-1368 ◽  
Author(s):  
Li Cui ◽  
Jen-Taut Yeh ◽  
Ke Wang ◽  
Qiang Fu
Keyword(s):  
Isothermal Crystallization ◽  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Polyamide 6 ◽  
Poly Vinyl Alcohol

scholarly journals Fabrication and characterization of electrospun feather keratin/poly(vinyl alcohol) composite nanofibers

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9854-9861 ◽  
Author(s):  
Ming He ◽  
Buning Zhang ◽  
Yao Dou ◽  
Guoqiang Yin ◽  
Yingde Cui ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Molecular Interactions ◽  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Composite Nanofibers ◽  
Electrospinning Process ◽  
Poly Vinyl Alcohol ◽  
Feather Keratin ◽  
Fabrication And Characterization

We have fabricated random and aligned feather keratin (FK)/PVA composite nanofibers through an electrospinning process. The morphology, molecular interactions, crystallization behavior, and tensile properties of the nanofibers were investigated.

Influence of amorphous polymer nanoparticles on the crystallization behavior of poly(vinyl alcohol) nanocomposites

2009 ◽  
Vol 17 (7) ◽  
pp. 476-482 ◽  
Author(s):  
Kyung Jin Lee ◽  
Jihye Lee ◽  
Jin-Yong Hong ◽  
Jyongsik Jang
Keyword(s):  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Amorphous Polymer ◽  
Polymer Nanoparticles ◽  
Poly Vinyl Alcohol

scholarly journals Synthesis and characterization of Hydrogels based on Potato Starch/Poly(vinyl Alcohol)/N, N'-Methylenebisacrylamide

2021 ◽  
Author(s):  
DIEGO DAVID PINZON-MORENO ◽  
Eder Clidio Vicuña-Galindo ◽  
José Vulfrano Gonzáles-Fernández ◽  
José Luis Soto-Gonzales ◽  
María Verónica Carranza-Oropeza
Keyword(s):  
Statistical Models ◽  
Vinyl Alcohol ◽  
Potato Starch ◽  
Polymer Degradation ◽  
Poly Vinyl Alcohol ◽  
Dsc Analysis ◽  
General Terms ◽  
Main Components ◽  
Tga And Dsc

Abstract Several hydrogels were synthesized by free-radical polymerization in an aqueous medium based on potato starch (PS), poly(vinyl alcohol) (PVA), and N,N'-Methylenebisacrylamide (MBAm), being possible to study these hydrogels as a function of the proportion of components incorporated. In this way, the products generated from the synthesis were characterized by swelling and deswelling kinetics, the first swelling being verified with Schott and statistical models, allowing to contrast the proximity between the experimental and theoretical behavior. Additionally, spectroscopy (FTIR), morphological (SEM), and thermal (TGA and DSC) analysis allowing to know the intrinsic characteristics of the material, increasing in general terms the knowledge of this type of material. In this context, it was possible to verify the characteristics and effectiveness of the synthesis and crosslinking of the main components. The experimental results obtained show that the synthesized hydrogels present representative first swellings consistent with kinetic and statistical models; however, there are significant changes in the second swelling derived from polymer degradation that occurs during the same swelling/deswelling cycles processes.

Poly(Vinyl Alcohol) Fiber Reinforced High Density Poly(Ethylene) Composites: Melting and Crystallization Behavior

2018 ◽  
Vol 773 ◽  
pp. 100-105
Author(s):  
Umi Rofiqah ◽  
Achmad Chafidz ◽  
Lilis Kistriyani ◽  
Mujtahid Kaavessina ◽  
Muhammad Rizal ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Crystallinity Index ◽  
Fiber Composites ◽  
High Density ◽  
Peak Temperature ◽  
Poly Vinyl Alcohol ◽  
Scanning Calorimetry ◽  
Poly Ethylene ◽  
Pva Fiber

In the present study, high density poly(ethylene) (HDPE)/poly(vinyl alcohol) (PVA) fiber composites were prepared via melt blending technique using a co-rotating twin screw extruder (TSE). The effect of four different PVA fiber concentrations (i.e. 0, 5, 10, 20 wt%) on the melt and crystallization behavior of the HDPE/PVA fiber composites were investigated. The surface morphology of the composites was analyzed by a scanning electron microscopy (SEM). Whereas, the melt and crystallization behavior of the composites were analyzed by a differential scanning calorimetry (DSC). The SEM analysis on the cryo-fractured surface of the HDPE/PVA fiber composites exhibited that the PVA fibers were well blended/distributed in the HDPE matrix. Additionally, the DSC test results showed that the addition of PVA fiber in the HDPE matrix did not significantly change the melting peak temperature (Tm) of the composites. Furthermore, a slight decrease of the crystallization peak temperature (Tc) can be observed when the PVA fiber was incorporated in the HDPE matrix, which indicated a weak nucleation ability of the PVA fibers in the HDPE crystallization process. The same trend was also observed for the crystallinity index (Xc). The crystallinity index of the composites decreased with increasing PVA fiber loadings.

scholarly journals Characterization of dual nano-size effects of ACC-cellulose nanofibrils on crystallization behavior of hydrophilic poly(vinyl alcohol)

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Gento Ishikawa ◽  
Tetsuo Kondo
Keyword(s):  
Size Effects ◽  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Cellulose Nanofibrils ◽  
Nucleating Agent ◽  
Melting Point Depression ◽  
Poly Vinyl Alcohol ◽  
Thermodynamic Evaluation ◽  
Aqueous Mixtures ◽  
Nano Size

AbstractThis study attempts to clarify thermodynamic quantification on interaction between poly(vinyl alcohol) (PVA) and wood-derived cellulose nanofibrils (CNFs) obtained by aqueous counter collision (ACC) method. Aqueous mixtures of PVA/ACC-CNFs with various fiber widths were cast as the target materials. The interfacial interactions between the two components were characterized through thermodynamic evaluation of the crystalline PVA component as a probe in the cast mixture. As the result, surface properties of the ACC-CNFs found to reflect on the crystallization behavior of the interacted PVA component, resulting in dual nano-size effects of either diluent or nucleating agent. Melting point depression behaviors of the PVA component indicated that ACC-CNFs with thinner widths induced nucleation effects on PVA crystallization, whereas ACC-CNFs with ca. 100 nm in width encouraged diluent effects on PVA components. It is noted that this trend found to be reverse to the case for PVA/ACC-CNFs of bacterial nanocellulose previously reported.

scholarly journals Enhancement of mechanical properties of polymeric nanofibers by controlling crystallization behavior using a simple freezing/thawing process

RSC Advances ◽  
2017 ◽  
Vol 7 (69) ◽  
pp. 43994-44000 ◽  
Author(s):  
Hoik Lee ◽  
Kyohei Yamaguchi ◽  
Tomoki Nagaishi ◽  
Masaaki Murai ◽  
Myungwoong Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Physical And Mechanical Properties ◽  
Poly Vinyl Alcohol ◽  
Polymeric Nanofibers ◽  
Thawing Process

We demonstrate the modulation of physical and mechanical properties by controlling crystallinity in cross-linked poly(vinyl alcohol) (PVA) nanofibers using a simple and straightforward freezing/thawing process.

The effect of graphene nanofiller on the crystallization behavior and mechanical properties of poly(vinyl alcohol)

2012 ◽  
Vol 62 (6) ◽  
pp. 901-908 ◽  
Author(s):  
Seungae Lee ◽  
Jin-Yong Hong ◽  
Jyongsik Jang
Keyword(s):  
Mechanical Properties ◽  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Poly Vinyl Alcohol

Thermal properties and non-isothermal crystallization behavior of biodegradable poly(p-dioxanone)/poly(vinyl alcohol) blends

2006 ◽  
Vol 55 (4) ◽  
pp. 383-390 ◽  
Author(s):  
Zhi-Xuan Zhou ◽  
Xiu-Li Wang ◽  
Yu-Zhong Wang ◽  
Ke-Ke Yang ◽  
Si-Chong Chen ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Isothermal Crystallization ◽  
Vinyl Alcohol ◽  
Crystallization Behavior ◽  
Poly Vinyl Alcohol ◽  
Biodegradable Poly
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