A new method to prepare low melting point polyamide-6 and study crystallization behavior of polyamide-6/calcium chloride complex by rheological method

2014 ◽  
Vol 132 (8) ◽  
pp. n/a-n/a
Author(s):  
Dianxin Liu ◽  
Qiang Zheng ◽  
Shengjun Lu ◽  
Cheng Li ◽  
Pan Lu ◽  
...  
Keyword(s):  
Melting Point ◽  
Calcium Chloride ◽  
Crystallization Behavior ◽  
Polyamide 6 ◽  
Chloride Complex ◽  
New Method ◽  
Rheological Method

Study on the Structure and Properties of the Low Melting Point of Nylon 6 Modified by Organic Montmorillonite

2013 ◽  
Vol 423-426 ◽  
pp. 301-306 ◽  
Author(s):  
Min Zhang ◽  
Sheng Jun Lu ◽  
Jie Yu ◽  
En Hui Xu ◽  
Min He ◽  
...  
Keyword(s):  
Melting Point ◽  
Crystallization Behavior ◽  
Layered Silicate ◽  
Polyamide 6 ◽  
Nylon 6 ◽  
Complexation Reaction ◽  
Structure Property ◽  
Organic Montmorillonite ◽  
The Matrix ◽  
Twin Screw

The Lower-melting point polyamide-6 (LPA6),with the melting point of 198°C,were a produced in a corotating twin screw extruder. The low melting point PA6/Organic montmorillonite (OMMT) composites were obtained by the method of melt extrusion.The effect of the content of OMMT on melting, morphology, crystallization behavior,mechanical properties of the composites was investigated by TEM, DSC, XRD. This work deals with combination of both components, which are the structure-property relationship of polymer/layered silicate nanocomposites, and the effects of complexation reaction on the montmorillonite dispersion in the matrix. Results showed that the complexation reaction have little effects on the exfoliation and dispersion of OMMT, and completely exfoliated with the content of OMMT was 5wt%.But it have significantly effects on the crystallization behavior of nylon 6,lead to the decraresd of the crystallinity. It was demonstrated that OMMT has a higher exfoliation degree lead to a balanced and enhanced mechanical behaviour.

Crystallization Behavior of Polyamide-6 Microcellular Nanocomposites

2004 ◽  
Vol 40 (5) ◽  
pp. 397-409 ◽  
Author(s):  
Mingjun Yuan ◽  
Lih-Sheng Turng ◽  
Shaoqin Gong ◽  
Andreas Winardi ◽  
Daniel Caulfield
Keyword(s):  
Crystallization Behavior ◽  
Polyamide 6

The non-isothermal crystallization behavior of polyamide 6 and polyamide 6/HDPE/MAH/L-101 composites

2019 ◽  
Vol 39 (2) ◽  
pp. 124-133 ◽  
Author(s):  
Bingxiao Liu ◽  
Guosheng Hu ◽  
Jingting Zhang ◽  
Zhongqiang Wang
Keyword(s):  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Crystallization Behavior ◽  
Isothermal Condition ◽  
Crystallization Rate ◽  
Polyamide 6 ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Analysis And Design ◽  
Processing Techniques

AbstractStudy of the crystallization kinetics is particularly necessary for the analysis and design of processing operations, especially the non-isothermal crystallization behavior, which is due to the fact that most practical processing techniques are carried out under non-isothermal conditions. The non-isothermal crystallization behaviors of polyamide 6 (PA6) and PA6/high-density polyethylene/maleic anhydride/2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (PA6/HDPE/MAH/L-101) composites were investigated by differential scanning calorimetry (DSC). The crystallization kinetics under non-isothermal condition was analyzed by the Jeziorny and Mo equations, and the activation energy was determined by the Kissinger and Takhor methods. The crystal structure and morphology were analyzed by wide-angle X-ray diffraction (WXRD) and polarized optical microscopy (POM). The results indicate that PA6/HDPE/MAH/L-101 has higher crystallization temperature and crystallization rate, which is explained as due to its heterogeneous nuclei.

New Method for the Extraction of Light Filth from Whole and Granulated Nutmeats

1970 ◽  
Vol 53 (3) ◽  
pp. 553-558
Author(s):  
John S Gecan ◽  
Diane J Howarth ◽  
Paris M Brickey
Keyword(s):  
Acid Hydrolysis ◽  
Calcium Chloride ◽  
Mineral Oil ◽  
New Method ◽  
Official Method ◽  
Coefficients Of Variation

Abstract A new method has been developed which is applicable to all nutmeats, with or without testa, either raw, dry, or oil roasted. Nutmeats are defatted by a 10 min boiling in chloroform (pecans require 3 defattings), after which the solvent is removed by aspiration and an isopropanol rinse. Following a short boiling deaeration and acid hydrolysis, light filth elements are extracted with mineral oil from a mixture of 60% ethanol and calcium chloride. Collaborative trials by the proposed method for nutmeats (except pecans) yielded significantly cleaner extraction papers and better recoveries of all light filth spike elements than by the official method. In addition, the proposed method resulted in reductions of coefficients of variation ranging from 47 to 93% of that for the official method. The modification for pecans, included in this method, required more extensive defatting and also resulted in improved light filth recoveries and reductions in coefficients of variation. Not all varieties of nutmeats were collaboratively studied; however, intralaboratory recovery trials on these nutmeats proved the proposed method superior to the official methods. The method is recommended for adoption as official first.

Influence of Polyhydroxybutyrate Content on the Crystallization Behavior of Polyamide 6‐polyhydroxy‐butyrate Blends

2019 ◽  
Vol 384 (1) ◽  
pp. 1800170
Author(s):  
Svenja Dill ◽  
Mariia Demicheva ◽  
Barbara Fleschutz ◽  
Roger Weinlein
Keyword(s):  
Crystallization Behavior ◽  
Polyamide 6 ◽  
Polyhydroxy Butyrate

Crystallization Behavior of Polyamide 6 Prepared from a Phenol/Dichloroethane Mixed Solvent

2013 ◽  
Vol 834-836 ◽  
pp. 272-275
Author(s):  
Yu Ling Lai ◽  
Hung Pang Feng ◽  
Ching Yeh Tung ◽  
Tzu Ming Wu ◽  
Tien Wei Shyr
Keyword(s):  
Differential Scanning Calorimeter ◽  
Crystallization Behavior ◽  
Mixed Solvent ◽  
Polymer Concentration ◽  
Weight Ratio ◽  
Polyamide 6 ◽  
Diluted Solution

In this work, bulk polyamide 6 (PA 6) polymer was dissolved in the mixed solvent of phenol and dichloroethane with a weight ratio of 3:2 as a diluted solution. PA6 films were prepared from the diluted solution with varied polymer concentration. The crystallization and melting behaviors of the PA 6 films were studied using a differential scanning calorimeter. Results show that the ability of crystallization of the PA 6 films was obviously lower than that of the bulk PA 6 polymer. The effect of mixed solvent on the crystallization behavior of the PA 6 films is obvious.

scholarly journals Effect of Bis (2-Aminoethyl) Adipamide/Adipic Acid Segment on Polyamide 6: Crystallization Kinetics Study

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1067 ◽  
Author(s):  
Yu-Hao Chen ◽  
Palraj Ranganathan ◽  
Chin-Wen Chen ◽  
Yi-Huan Lee ◽  
Syang-Peng Rwei
Keyword(s):  
Crystallization Kinetics ◽  
Adipic Acid ◽  
Crystallization Behavior ◽  
Three Dimensional ◽  
Isothermal Condition ◽  
Crystallization Rate ◽  
Polyamide 6 ◽  
X Ray Diffraction ◽  
Dimensional Growth ◽  
Complex Polymer

The crystallization behavior of novel polyamide 6 (PA6) copolyamides with different amounts of bis (2-aminoethyl) adipamide/adipic acid (BAEA/AA) segment was investigated. The wide-angle X-ray diffraction (WAXD) results showed that as the amount of BAEA/AA segment increased to 10 mole%, the crystalline forms of all PA6 copolyamide were transferred from the stable α-form to the unstable γ-form because of the complex polymer structure. According to studies of crystallization kinetics, the Avrami exponent (n) values for all copolyamide samples ranged from 1.43 to 3.67 under isothermal conditions, implying that the crystallization is involved in the two- to three-dimensional growth at a high temperature of isothermal condition. The copolyamides provided a slower crystallization rate and higher crystallization activation energy (ΔEa) than neat PA6. Polyamide containing 10 mole% of BEAE/AA content exhibited a unique crystallization behavior in the coexistence of the α and γ forms. These results deepen our understanding of the relationship between BAEA/AA content, crystal structure, and its crystallization behavior in low-melting PA6, and they make these types of copolyamides useful for their practical application.

Sign in / Sign up

Export Citation Format

Share Document