The crystallization behavior and mechanical properties of polylactic acid in the presence of a crystal nucleating agent

2011 ◽  
Vol 125 (2) ◽  
pp. 1108-1115 ◽  
Author(s):  
Zhaobin Tang ◽  
Chuanzhi Zhang ◽  
Xiaoqing Liu ◽  
Jin Zhu
Keyword(s):  
Mechanical Properties ◽  
Polylactic Acid ◽  
Crystallization Behavior ◽  
Nucleating Agent

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 Functionality of Cellulose Nanofiber as Bio-Based Nucleating Agent and Nano-Reinforcement Material to Enhance Crystallization and Mechanical Properties of Polylactic Acid Nanocomposite

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 389
Author(s):  
Siti Shazra Shazleen ◽  
Tengku Arisyah Tengku Yasim-Anuar ◽  
Nor Azowa Ibrahim ◽  
Mohd Ali Hassan ◽  
Hidayah Ariffin
Keyword(s):  
Mechanical Properties ◽  
Polylactic Acid ◽  
Cellulose Nanofibers ◽  
Crystallization Rate ◽  
Nucleating Agent ◽  
Melt Processing ◽  
Dual Function ◽  
Biodegradable Material ◽  
Reinforcement Material ◽  
Single Use

Polylactic acid (PLA), a potential alternative material for single use plastics, generally portrays a slow crystallization rate during melt-processing. The use of a nanomaterial such as cellulose nanofibers (CNF) may affect the crystallization rate by acting as a nucleating agent. CNF at a certain wt.% has been evidenced as a good reinforcement material for PLA; nevertheless, there is a lack of information on the correlation between the amount of CNF in PLA that promotes its functionality as reinforcement material, and its effect on PLA nucleation for improving the crystallization rate. This work investigated the nucleation effect of PLA incorporated with CNF at different fiber loading (1–6 wt.%) through an isothermal and non-isothermal crystallization kinetics study using differential scanning calorimetry (DSC) analysis. Mechanical properties of the PLA/CNF nanocomposites were also investigated. PLA/CNF3 exhibited the highest crystallization onset temperature and enthalpy among all the PLA/CNF nanocomposites. PLA/CNF3 also had the highest crystallinity of 44.2% with an almost 95% increment compared to neat PLA. The highest crystallization rate of 0.716 min–1 was achieved when PLA/CNF3 was isothermally melt crystallized at 100 °C. The crystallization rate was 65-fold higher as compared to the neat PLA (0.011 min–1). At CNF content higher than 3 wt.%, the crystallization rate decreased, suggesting the occurrence of agglomeration at higher CNF loading as evidenced by the FESEM micrographs. In contrast to the tensile properties, the highest tensile strength and Young’s modulus were recorded by PLA/CNF4 at 76.1 MPa and 3.3 GPa, respectively. These values were, however, not much different compared to PLA/CNF3 (74.1 MPa and 3.3 GPa), suggesting that CNF at 3 wt.% can be used to improve both the crystallization rate and the mechanical properties. Results obtained from this study revealed the dual function of CNF in PLA nanocomposite, namely as nucleating agent and reinforcement material. Being an organic and biodegradable material, CNF has an increased advantage for use in PLA as compared to non-biodegradable material and is foreseen to enhance the potential use of PLA in single use plastics applications.

scholarly journals Properties Enhancement of High Molecular Weight Polylactide Using Stereocomplex Polylactide as a Nucleating Agent

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1725
Author(s):  
Purba Purnama ◽  
Muhammad Samsuri ◽  
Ihsan Iswaldi
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Crystallization Behavior ◽  
Testing Machine ◽  
Nucleating Agent ◽  
Mechanical And Thermal Properties ◽  
Nucleating Agents ◽  
Thermal And Mechanical Properties ◽  
X Ray ◽  
Universal Testing

As one of the most attractive biopolymers nowadays in terms of their sustainability, degradability, and material tune-ability, the improvement of polylactide (PLA) homopolymer properties by studying the utilization of stereocomplex polylactide (s-PLA) effectively and efficiently is needed. In this sense, we have studied the utilization of s-PLA compared to poly D-lactide (PDLA) homopolymers as a nucleating agent for PLA homopolymers. The mechanical and thermal properties and crystallization behavior of PLA homopolymers in the presence of nucleating agents have been evaluated using a universal testing machine, differential scanning calorimeter, and X-ray diffractometer instruments, respectively. PDLA and s-PLA materials can be used to increase the thermal and mechanical properties of poly L-lactide (PLLA) homopolymers. The s-PLA materials increased the mechanical properties by increasing crystallinity of the PLLA homopolymers. PLLA/s-PLA enhanced mechanical properties to a certain level (5% s-PLA content), then decreased them due to higher s-PLA materials affecting the brittleness of the blends. PDLA homopolymers increased mechanical properties by forming stereocomplex PLA with PLLA homopolymers. Non-isothermal and isothermal evaluation showed that s-PLA materials were more effective at enhancing PLLA homopolymer properties through nucleating agent mechanism.

Mechanical properties and crystallization behavior of polypropylene with cyclodextrin derivative as β-nucleating agent

2011 ◽  
Vol 289 (10) ◽  
pp. 1157-1166 ◽  
Author(s):  
Anran Zeng ◽  
Yuying Zheng ◽  
Shangchang Qiu ◽  
Yong Guo ◽  
Baoming Li
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Nucleating Agent ◽  
Cyclodextrin Derivative

Influence of a synthetic ureido nucleating agent on crystallization behavior and mechanical properties of polyamide 6

2015 ◽  
Vol 55 (9) ◽  
pp. 2011-2017 ◽  
Author(s):  
Chunfa Ouyang ◽  
Weili Xue ◽  
Duoyou Zhang ◽  
Qun Gao ◽  
Xiangyong Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Nucleating Agent ◽  
Polyamide 6
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