Preparation and characterization of Nylon-6/exfoliated graphite composite via a combination method of in situ polymerization and thermal expansion

2011 ◽  
Vol 22 (11) ◽  
pp. 1656-1661
Author(s):  
Ji Hui Li ◽  
Mei Li ◽  
Hui Fang Da ◽  
Qian Liu ◽  
Man Hui Liu
Keyword(s):  
Thermal Expansion ◽  
In Situ Polymerization ◽  
Nylon 6 ◽  
Exfoliated Graphite ◽  
Combination Method ◽  
Graphite Composite

Research into High Performance Zeolite/Monomer Casting Nylon 6 (MCPA6) Composites

2013 ◽  
Vol 442 ◽  
pp. 134-137
Author(s):  
Bo Fen Huang ◽  
Han Xuan Liang ◽  
Zhi Yuan Li ◽  
Yan Chao Bai
Keyword(s):  
Thermal Decomposition ◽  
Impact Strength ◽  
High Performance ◽  
In Situ Polymerization ◽  
Nylon 6 ◽  
Experimental Results ◽  
The Impact

Zeolite / MC nylon 6 composites were prepared , followed by morphology and properties characterization of composites. The results demonstrated that a large number of pearlitic structures appeared at the interphase between the organic phases and the inorganic phases, indicating that caprolactam had happened anionic in-situ polymerization within the zeolite. The zeolite played a role of molecular rivet in zeolite / MCPA6 composites. The experimental results also showed that the composites performances were largely improved compared with pure MCPA6. When zeolite was 1 Phr, the impact strength of the composite was increased by 58%, temperature of thermal decomposition was rised by 92.9 °C. When zeolite reached 5 Phr, the composite shrinkage rate was reduced by 33%.

Preparation and characterization of conducting nylon 6 fibers

2009 ◽  
Vol 24 (8) ◽  
pp. 2728-2735 ◽  
Author(s):  
A. Saritha Chandran ◽  
Sunil K. Narayanankutty
Keyword(s):  
Photoelectron Spectroscopy ◽  
In Situ Polymerization ◽  
Fiber Surface ◽  
Nylon 6 ◽  
Etching Time ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray

Conducting nylon 6 fibers were prepared by in situ polymerization of aniline on to the fiber surface, after providing a chemical etching treatment to the fibers using chromic acid. The properties of the etched and polyaniline (PANI) coated fibers were evaluated using scanning electron microscopy, x-ray photoelectron spectroscopy, infrared spectroscopy, x-ray diffraction, thermogravimetry, and differential scanning calorimetry. Though the etching process caused a marginal decline in the mechanical properties of the fiber, it provided a reasonably rough surface for PANI adhesion and enhanced the conductivity of the fiber. The conductivity increased from 4.22 × 10−2 to 3.72 × 10−1 S/cm at an etching time of 4 h.

scholarly journals Morphology and crystallization kinetics of Rubber-modified Nylon 6 Prepared by Anionic In-situ Polymerization

2020 ◽  
Vol 27 (1) ◽  
pp. 204-215
Author(s):  
Hongkai Zhao ◽  
Dengchao Zhang ◽  
Yingshuang Li
Keyword(s):  
Crystallization Kinetics ◽  
In Situ Polymerization ◽  
Good Description ◽  
Nylon 6 ◽  
Avrami Equation ◽  
Infrared Analysis ◽  
Chain Segment ◽  
The Impact ◽  
Kinetics Of

AbstractIn this work, we modified nylon 6 with liquid rubber by in-situ polymerization. The infrared analysis suggested that HDI urea diketone is successfully blocked by caprolactam after grafting on hydroxyl of HTPB, and the rubber-modified nylon copolymer is generated by the anionic polymerization. The impact section analysis indicated the rubber-modified nylon 6 resin exhibited an alpha crystal form.With an increase in the rubber content, nylon 6 was more likely to generate stable α crystal. Avrami equation was a good description of the non-isothermal crystallization kinetics of nylon-6 and rubber-modified nylon-6 resin. Moreover, it is found that the initial crystallization temperature of nylon-6 chain segment decreased due to the flexible rubber chain segment. n value of rubber-modified nylon-6 indicated that its growth was the coexistence of two-dimensional discoid and three-dimensional spherulite growth. Finally, the addition of the rubber accelerated the crystallization rate of nylon 6.

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