Crystallization behavior and morphology of polylactic acid (PLA) with aromatic sulfonate derivative

2016 ◽  
Vol 133 (28) ◽  
Author(s):  
Vidhya Nagarajan ◽  
Amar K. Mohanty ◽  
Manjusri Misra
Keyword(s):  
Polylactic Acid ◽  
Crystallization Behavior ◽  
Aromatic Sulfonate

The Effect of Uniaxial Stretching on the Crystallization Behaviors of Polylactic Acid Film

2011 ◽  
Vol 418-420 ◽  
pp. 625-628 ◽  
Author(s):  
Hui Li Xie ◽  
Kai Guo ◽  
Jin Zhou Chen ◽  
Wan Jie Wang ◽  
Ming Jun Niu ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Crystallization Behavior ◽  
Crystal Form ◽  
Stretch Ratio ◽  
Uniaxial Tensile ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Uniaxial Stretching ◽  
X Ray ◽  
Stretching Ratio

Abstract. The effect of uniaxial stretching of different stretching ratio at 80 °C, 90°C, 100°C, 110 °C and 120°C on the crystallization behavior of polylactic acid (PLA) film was investigated by using differential scanning calorimetry (DSC), wide-angle X-ray diffraction (XRD) and polarizing microscope (POM). The results showed that the crystallinity of PLA film was improved via uniaxial tensile orientation and increased with increasing stretch ratio, and the crystallinity of PLA film reached the maximum under the conditions of 90°C and stretching ratio 300%. Stretched PLA films show α crystal form. The spherulites deform to ellipsoids after stretching.

Enhanced thermostability of polylactic acid by N-(4-carboxyphenyl) maleimide–alt–styrene

2020 ◽  
pp. 096739112095166
Author(s):  
Siyuan Jiang ◽  
Yufei Liu ◽  
Wei Yan ◽  
Min He ◽  
Shuhao Qin ◽  
...  
Keyword(s):  
Composite Material ◽  
Polylactic Acid ◽  
Crystallization Temperature ◽  
Crystallization Behavior ◽  
Crystallization Rate ◽  
Thermomechanical Property ◽  
Degradation Behavior ◽  
Thermal Degradation Behavior ◽  
Before And After ◽  
Heat Deflection Temperature

The heat-resistant agent N-(4-carboxyphenyl) maleimide–alt–styrene (PCS) was used to modify polylactic acid (PLA) in order to improve the thermostability of PLA. The heat deflection temperature (HDT), thermodegradation, crystallization behavior and thermomechanical property were analyzed. The HDT of PLA added with PCS increased by about 10°C, and after heat treatment, the improvement of HDT was more significant. The thermal degradation behavior of PLA before and after modification hardly changed. The crystallinity ( Xc), crystallization rate ( 1/t1/2) and crystallization temperature ( Tc) of the composite material were significantly improved, but the crystalline structure did not change. The crystallinity of the composite material was twice that of pure PLA, the crystallization rate increased by about 30% and the crystallization temperature went up more than 10°C. The storage modulus ( E’) of PLA was improved by PCS due to enhancing its crystallinity. The thermostability of PLA was significant improved after PCS is added.

Crystallization and Mechanical Properties of Nano ZnO/PP/PLA Composite Filaments

2009 ◽  
Vol 620-622 ◽  
pp. 485-488 ◽  
Author(s):  
Ying Chen Zhang ◽  
Jian Fei Xie ◽  
Hong Yan Wu ◽  
Y.P. Qiu
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Polylactic Acid ◽  
Crystallization Behavior ◽  
Interfacial Interaction ◽  
Zno Nanoparticle ◽  
Nano Zno ◽  
Percent Crystallinity

In the present work, the effect of plasma treated ZnO nanoparticle on crystallization behavior and properties of polypropylene（PP）/ polylactic acid （PLA）composites filaments has been intensively researched. Our results show that, although the interfacial interaction between PP/PLA and nano ZnO is very weak, addition of nano ZnO and the proportional relations of PP/PLA in composites induced the increase of percent crystallinity. Tensile results showed that nano ZnO /PP/PLA nanocomposites filaments were strain rate sensitive materials and the activation volumes of the nano ZnO /PP/PLA nanocomposite filaments by following Eyring’s equation could be evaluated.

scholarly journals ISOTHERMAL COLD CRYSTALLIZATION BEHAVIOR OF AMORPHOUS POLYLACTIC ACID PREPARED BY RAPID COMPRESSION

2013 ◽  
Vol 013 (8) ◽  
pp. 1085-1091 ◽  
Author(s):  
Zhang Rui-jing ◽  
Shao Chun-guang ◽  
Li Qian ◽  
Wang Ming-you ◽  
Zhang Dou-dou ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Crystallization Behavior ◽  
Cold Crystallization ◽  
Rapid Compression

scholarly journals Analysis of the rheological property and crystallization behavior of polylactic acid (Ingeo™ Biopolymer 4032D) at different process temperatures

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 702-709
Author(s):  
Hyeong Min Yoo ◽  
Su-Yeon Jeong ◽  
Sung-Woong Choi
Keyword(s):  
Rheological Property ◽  
Polylactic Acid ◽  
Crystallization Kinetics ◽  
Crystallization Behavior ◽  
Crystallization Rate ◽  
Avrami Equation ◽  
Scanning Calorimetry ◽  
Isothermal Crystallization Kinetics ◽  
Shear Rates ◽  
Kinetics Of

Abstract The aim of this study was to determine the rheological property and crystallization behavior of polylactic acid (PLA) with improved heat resistance (Ingeo™ Biopolymer 4032D) through investigation of the melt viscosity and crystallization kinetics of PLA at different process temperatures. The viscosity was measured using a rotational rheometer under conditions of shear rates of 0.01, 0.1, and 1/s. The obtained rheological data show that the viscosity tended to decrease slightly as the shear rate increases and decrease sharply as the temperature increases from 180°C to 210°C. To investigate the effect of the process temperature on the crystallization kinetics and final crystallinity of PLA, thermal analysis using isothermal differential scanning calorimetry (DSC) were also performed. The Avrami equation was successfully applied for the isothermal crystallization kinetics model. From crystallization temperature of 85°C to 120°C, we found that the Ingeo™ Biopolymer 4032D PLA had the fastest crystallization rate (t 1/2: 26.0 min) and the largest crystallinity (47.4%) at 100°C.

Glycidyl Methacrylate Grafted Polylactic Acid: Morphological Properties and Crystallization Behavior

2015 ◽  
Vol 354 (1) ◽  
pp. 237-243 ◽  
Author(s):  
Parina Kangwanwatthanasiri ◽  
Nitinat Suppakarn ◽  
Chaiwat Ruksakulpiwat ◽  
Yupaporn Ruksakulpiwat
Keyword(s):  
Polylactic Acid ◽  
Glycidyl Methacrylate ◽  
Crystallization Behavior ◽  
Morphological Properties

Influence of graphene nanoscrolls on the crystallization behavior and nano‐mechanical properties of polylactic acid

2019 ◽  
Vol 30 (7) ◽  
pp. 1825-1835 ◽  
Author(s):  
Oluwakemi Ajala ◽  
Caroline Werther ◽  
Peyman Nikaeen ◽  
Raj Pal Singh ◽  
Dilip Depan
Keyword(s):  
Mechanical Properties ◽  
Polylactic Acid ◽  
Crystallization Behavior ◽  
Graphene Nanoscrolls
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