scholarly journals On the use of tris(nonylphenyl) phosphite as a chain extender in melt-blended poly(hydroxybutyrate-co-hydroxyvalerate)/clay nanocomposites: Morphology, thermal stability, and mechanical properties

2015 ◽  
Vol 133 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jennifer González-Ausejo ◽  
Estefania Sánchez-Safont ◽  
José Gámez-Pérez ◽  
Luis Cabedo
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Chain Extender ◽  
Clay Nanocomposites ◽  
A Chain

Application of bis(glycidyloxy)phenylphosphine oxide as a chain extender for polyamide-6

RSC Advances ◽  
2015 ◽  
Vol 5 (40) ◽  
pp. 31878-31885 ◽  
Author(s):  
Alvianto Wirasaputra ◽  
Jianqing Zhao ◽  
Yaming Zhu ◽  
Shumei Liu ◽  
Yanchao Yuan
Keyword(s):  
Mechanical Properties ◽  
Small Molecule ◽  
Polyamide 6 ◽  
Chain Extender ◽  
Chain Extension ◽  
A Chain ◽  
Phenylphosphine Oxide

Figure melt torque of PA6 mixed with different contents of chain extender BGPPO. The addition of small molecule diepoxide (BGPPO) greatly enhanced the melt torque, rheological and mechanical properties of polyamide-6 through chain extension reaction.

Metal-Containing Polyurethanes: An Overview

2010 ◽  
Vol 657 ◽  
pp. 1-25 ◽  
Author(s):  
Natarajan Senthilkumar ◽  
Mohammad Luqman
Keyword(s):  
Thermal Stability ◽  
Liquid Crystalline ◽  
Heterocyclic Ring ◽  
Chain Extender ◽  
Plastic Electronics ◽  
Major Disadvantage ◽  
Ring Structures ◽  
A Chain ◽  
Multifunctional Polymers ◽  
Advanced Applications

The combination of the concept of metallopolymers with urethane chemistry offers a versatile approach for the synthesis of new polyurethane materials. Polyurethanes are a distinct class of materials with tremendous industrial importance, and it is of interest to develop these materials with modified thermal and liquid crystalline behavior for advanced applications. Generally, polyurethanes suffer a major disadvantage of poor thermal stability. This can be improved upon by chemical modification of their structures by the incorporation of thermally stable heterocyclic ring structures along with transition metals. Metal-containing polyurethanes prepared from a polymeric diol, diisocyanate and a metal containing diol (metallodiol and metallomesogenic diol) as a chain extender are attracting contemporary research interest. The addition of a polymeric diol (polyol) induces flexibility to the polyurethane by reducing the glass transition temperature, increases its solubility and imparts elastomeric properties. Multifunctional polymers are materials poised for applications in different avenues with preference for plastic electronics. An introduction-cum-overview of synthesis and applications of metal-containing polyurethanes is presented in this chapter.

Morphology, mechanical properties, and thermal stability of rigid PVC/clay nanocomposites

2010 ◽  
Vol 51 (4) ◽  
pp. 641-646 ◽  
Author(s):  
Margarita Mondragón ◽  
Saúl Sánchez-Valdés ◽  
María E. Sanchez-Espíndola ◽  
Jesús E. Rivera-López
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Clay Nanocomposites ◽  
Rigid Pvc ◽  
Thermal Stability Of

Preparation, Characterization and Physical Properties of Polyvinyl Alcohol-Layered Clay Nanocomposites

2014 ◽  
Vol 997 ◽  
pp. 433-437
Author(s):  
Hong Yan Tian ◽  
Yue Hui Wang ◽  
Chun Liu ◽  
Kui Niu
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Interlayer Spacing ◽  
Dynamic Mechanical Properties ◽  
Poly Vinyl Alcohol ◽  
Clay Nanocomposites ◽  
Casting Method ◽  
Photochemical Stability ◽  
Layered Clay ◽  
Double Hydroxide

This work focused on the preparation of poly (vinyl alcohol) (PVA)/ layered double hydroxide (LDH) and LDHSA nanocomposites by casting method. The morphology and interlayer spacing of the composites were characterized. The mechanical properties and the photochemical stability of the film of PVA, PVA/LDH and PVA/LDHSA have been studied and compared with PVA/MMT nanocomposites reported in previously. The results indicated that the thermal stability and dynamic mechanical properties of the PVA matrix in the PVA/LDH films and PVA/MMT films was enhanced. PVA/LDH films and PVA/OMMT films were shown stable photochemically more than those of pure PVA.

Thermal Stability, Mechanical Properties and Solvent Resistance of PP/clay Nanocomposites Prepared by Melt Blending

2007 ◽  
Vol 7 (17) ◽  
pp. 2480-2484 ◽  
Author(s):  
Shahryar Jafari Nejad ◽  
Seyed Javad Ahmadi . ◽  
Hossein Abolghasemi . ◽  
Ahmad Mohaddespour .
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Clay Nanocomposites ◽  
Melt Blending ◽  
Solvent Resistance

Advances in Microcellular Foam Processing of PLA

2016 ◽  
Vol 717 ◽  
pp. 68-72 ◽  
Author(s):  
Zhi Zhong Han ◽  
You Cheng Zhang ◽  
Wei Min Yang ◽  
Peng Cheng Xie
Keyword(s):  
Mechanical Properties ◽  
Cell Density ◽  
Cell Morphology ◽  
Expansion Ratio ◽  
Chain Extender ◽  
Microcellular Foam ◽  
Foaming Process ◽  
Microcellular Foaming ◽  
Alternative Materials ◽  
A Chain

PLA is a bio-based biodegradable plastic, which has excellent biocompatibility and biodegradability. Because the mechanical properties of microcellular foaming material is similar to petroleum-based plastics (PS), PLA foams have been considered as ideal alternative materials. However, PLA has several inherent drawbacks such as low melt strength and slow crystallization kinetics, which severely inhibit the PLA foaming process to produce high-density forms and uniform cell morphology. By adding a chain extender or nanoparticles, and blending with other biological materials, these ways could effectively enhance the expansion ratio and the cell density of PLA and improve the mechanical properties of PLA foams. The most current investigations on microcellular foaming of PLA were reviewed in the article, and outlook of PLA foams was raised.

Influence of the Type of Alkylamine Organic Modifiers on Thermal Mechanical Behavior and other Related Properties of Natural Rubber/Clay Nanocomposites

2013 ◽  
Vol 844 ◽  
pp. 217-220 ◽  
Author(s):  
Uraiwan Sookyung ◽  
Woothichai Thaijaroen ◽  
Norbert Vennemann ◽  
Charoen Nakason
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Stress Relaxation ◽  
Natural Rubber ◽  
The Other ◽  
Clay Nanocomposites ◽  
Organic Modifier ◽  
Organic Modifiers ◽  
Different Types ◽  
Thermal Stability Of

Sodium-montmorillonite (Na-MMT) nanoclay was modified with different types of alkylamine organic modifier including primary and quaternary alkylamines. Influence types of alkylamine on properties of natural rubber/clay nanocomposites was investigated. It was found that organoclays caused improvement of mechanical properties of natural rubber, and accelerated vulcanization reaction with higher degree of crosslinking. In addition, organoclay modified with quaternary alkylamine showed significance cure reversion phenomenon which caused reduction of thermal stability. On the other hand, primary alkylamine modified nanoclay caused improvement of thermal stability of natural rubber. Moreover, stress relaxation was observed at the melting temperature of the modifying agent.

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