Effect ofin situsurface-modified nano-SiO2on the thermal and mechanical properties and crystallization behavior of nylon 1010

2010 ◽  
Vol 115 (6) ◽  
pp. 3339-3347 ◽  
Author(s):  
Fang Xiuwei ◽  
Li Xiaohong ◽  
Yu Laigui ◽  
Zhang Zhijun
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Thermal And Mechanical Properties ◽  
Nylon 1010

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.

scholarly journals Effect of 1,2,4,5-Benzenetetracarboxylic Acid on Unsaturated Poly(butylene adipate-co-butylene itaconate) Copolyesters: Synthesis, Non-Isothermal Crystallization Kinetics, Thermal and Mechanical Properties

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1160 ◽  
Author(s):  
Chin-Wen Chen ◽  
Te-Sheng Hsu ◽  
Kuan-Wei Huang ◽  
Syang-Peng Rwei
Keyword(s):  
Mechanical Properties ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Crystallization Behavior ◽  
Crystallization Rate ◽  
Cross Linking ◽  
Thermal And Mechanical Properties ◽  
Isothermal Crystallization Kinetics ◽  
Melt Polymerization ◽  
Thermal Mechanical Properties

Unsaturated poly (butylene adipate-co-butylene itaconate) (PBABI) copolyesters were synthesized through melt polymerization composed of 1,4-butanediol (BDO), adipic acid (AA), itaconic acid (IA) and 1,2,4,5-benzenetetracarboxylic acid (BTCA) as a cross-linking modifier. The melting point, crystallization and glass transition temperature of the PBABI copolyesters were detected around 29.8–49 °C, 7.2–29 °C and −51.1 and −58.1 °C, respectively. Young’s modulus can be modified via partial cross-linking by BTCA in the presence of IA, ranging between 32.19–168.45 MPa. Non-isothermal crystallization kinetics were carried out to explore the crystallization behavior, revealing the highest crystallization rate was placed in the BA/BI = 90/10 at a given molecular weight. Furthermore, the thermal, mechanical properties, and crystallization rate of PBABI copolyesters can be tuned through the adjustment of BTCA and IA concentrations.

scholarly journals Thermal and Mechanical Properties of Silica–Lignin/Polylactide Composites Subjected to Biodegradation

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2257 ◽  
Author(s):  
Aleksandra Grząbka-Zasadzińska ◽  
Łukasz Klapiszewski ◽  
Sławomir Borysiak ◽  
Teofil Jesionowski
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Crystallization Behavior ◽  
Composite Films ◽  
Thermal And Mechanical Properties ◽  
Scanning Calorimetry ◽  
Nonisothermal Crystallization ◽  
Hybrid Filler ◽  
Hybrid Fillers ◽  
Morphology Of Films

In this paper, silica–lignin hybrid materials were used as fillers for a polylactide (PLA) matrix. In order to simulate biodegradation, PLA/hybrid filler composite films were kept in soil of neutral pH for six months. Differential scanning calorimetry (DSC) allowed analysis of nonisothermal crystallization behavior of composites, thermal analysis provided information about their thermal stability, and scanning electron microscopy (SEM) was applied to define morphology of films. The influence of biodegradation was also investigated in terms of changes in mechanical properties and color of samples. It was found that application of silica–lignin hybrids as fillers for PLA matrix may be interesting not only in terms of increasing thermal stability, but also controlled biodegradation. To the best knowledge of the authors, this is the first publication regarding biodegradation of PLA composites loaded with silica–lignin hybrid fillers.

scholarly journals Biobased copolyesters: synthesis, crystallization behavior, thermal and mechanical properties of poly(ethylene glycol sebacate-co-ethylene glycol 2,5-furan dicarboxylate)

RSC Advances ◽  
2017 ◽  
Vol 7 (23) ◽  
pp. 13798-13807 ◽  
Author(s):  
Guoqiang Wang ◽  
Min Jiang ◽  
Qiang Zhang ◽  
Rui Wang ◽  
Guangyuan Zhou
Keyword(s):  
Mechanical Properties ◽  
Ethylene Glycol ◽  
Crystallization Behavior ◽  
Sebacic Acid ◽  
Thermal And Mechanical Properties ◽  
Poly Ethylene Glycol ◽  
Furandicarboxylic Acid ◽  
Poly Ethylene

A series of biobased copolyesters, poly(ethylene sebacate-co-ethylene 2,5-furandicarboxylate) (PESF), were synthesized from available biobased ethylene glycol (EG), sebacic acid (SA) and 2,5-furandicarboxylic acid (FDCA).

scholarly journals Crystallization behavior, thermal and mechanical properties of PHBV/graphene nanosheet composites

2013 ◽  
Vol 31 (4) ◽  
pp. 670-678 ◽  
Author(s):  
Bing-jie Wang ◽  
Yu-jie Zhang ◽  
Jian-qiang Zhang ◽  
Qu-ting Gou ◽  
Zong-bao Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Thermal And Mechanical Properties ◽  
Graphene Nanosheet

Rates of Crystallization of cis-1,4-Polybutadiene in Elastomer Blends

1967 ◽  
Vol 40 (2) ◽  
pp. 341-349 ◽  
Author(s):  
M. C. Morris
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Glass Transition ◽  
Thermal Properties ◽  
Electron Microscope ◽  
Crystallization Behavior ◽  
Crystallization Rate ◽  
Rate Data ◽  
Thermal And Mechanical Properties ◽  
Crystallization Properties

Abstract Blends of polybutadiene with SBR show different crystallization behavior than blends with polyisoprene. One might suppose that the similarities in SBR and polybutadiene are sufficient to allow more intimate mixing than can be obtained by using entirely different polymers such as the polyisoprene polybutadiene pair. Possibly, bulk viscosities are important here, but no matter what the cause, crystallization properties have shown differences in the way the polybutadiene was situated. Also, large changes in the glass transition occurred for those materials which showed sizeable retardation in crystallization rate. An interpretation of the crystallization rate data based on particle size was given in this discussion because a precedent exists for this effect. However, molecular compatibility has not been ruled out. Further investigation of thermal properties should help clarify this point. It will be interesting to learn to what extent particle size alone affects the thermal behavior of blends. Perhaps more work along these lines coupled with improved optical and electron microscope techniques will provide some answers to our questions on how phase structure affects thermal and mechanical properties.

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