Morphology evolution of a thermotropic liquid‐crystalline polymer in a polyamide 6,6 matrix regulated by graphene

Wang, Mingming; Xin, Yuanshi; Su, Chao; Feng, Xue; Xu, Fanglin; Li, Tongsheng

doi:10.1002/app.43735

Cited by 5 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is convenient to obtain polymeric composites with much enhanced mechanical properties by blending amorphous or crystalline polymers with TLCP. Accordingly, many studies have focused on PA6 composites reinforced with TLCP [ 16 , 17 , 18 , 19 , 20 ]. However, when TLCP was introduced into PA6 matrix, the resulting performance of those composite was unsatisfactory in general due to poor compatibility between those species.…”

Section: Introductionmentioning

confidence: 99%

The Preparation of Monomer Casting Polyamide 6/Thermotropic Liquid Crystalline Polymer Composite Materials with Satisfactory Miscibility

Qiu

Yue

et al. 2022

Polymers

View full text Add to dashboard Cite

It is highly expected to develop a simple and effective method to reinforce polyamide 6 (PA6) to enlarge its application potential. This is challenging because of frequently encountered multi-component phase separations. In this paper, we propose a novel method to solve this issue, essentially comprising two steps. Firstly, a kind of poly (amide-block-aramid) block copolymers, i.e., thermotropic liquid crystalline polymer (TLCP)-polyamide 6 (TLCP-PA6), that contains both rigid aromatic liquid crystal blocks, and flexible alkyl blocks were synthesized. It is unique in that TLCP is chemically linked with PA6, which is advantageous in excellent chemical and physical miscibility with the precursors of monomer casting polyamide 6 (MCPA6), i.e., ε-caprolactam. Secondly, such newly synthesized block copolymer TLCP-PA6 was dissolved in the melting ε-caprolactam, and followed by in situ polymerization to obtain composite polymer blends, i.e., MCPA6/TLCP-PA6. The thermodynamic, morphological, and crystalline properties of MCPA6/TLCP-PA6 can be easily manipulated by tailoring the loading ratios between TLCP-PA6 and ε-caprolactam. Especially, at the optimized condition, such MCPA6/TLCP-PA6 blends show an excellent miscibility. Systematic characterizations, including nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimeter (DSC), and polarizing optical microscope (POM), were performed to confirm these statements. In view of these results, it is anticipated that the overall mechanical properties of such PA6-based polymer composites will be satisfactory, which should enable applications in the modern plastic industry and other emerging areas, such as wearable fabrics.

show abstract

Section: Introductionmentioning

confidence: 99%

The Preparation of Monomer Casting Polyamide 6/Thermotropic Liquid Crystalline Polymer Composite Materials with Satisfactory Miscibility

Qiu

Yue

et al. 2022

Polymers

View full text Add to dashboard Cite

show abstract

Programmable liquid crystal elastomer matrix through photomechanical responses

Zhao

Liu

2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

Considering the dependence of photomechanical responses of liquid crystal elastomers on the director orientation, the performance controlling through director orientation design becomes possible. In this article, a programmable liquid crystal elastomer matrix is proposed to achieve the desired functions. First, a modeling framework about the spontaneous bending of liquid crystal elastomer square plate with arbitrary director orientation is developed. Three kinds of spontaneous bending configurations are obtained along with the variation of the director orientation, and the critical division of the director orientation is given. Based on the deformation characteristic, the director orientation of the liquid crystal elastomer matrix is programmed and several typical prototypical functions, such as 3D code or image display, are discussed. This work provides the guidance for the application of the liquid crystal elastomer in haptic display, braille display, remotely‐controlled actuators, and codes.

show abstract

In‐situ grafted POE for reduction of flow marks on injection molding of PP

Zhu

Xiong

Ding

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

Flow mark phenomenon is one of the typical and common surface defects that affect industrial desired surface and long‐life mechanical properties of the injection molding of polypropylene (PP). The effect of in‐situ grafted polyolefin elastomer (POE) on the flow marks on injection molding of PP was investigated by combining experimental methods with dissipative particle dynamics (DPD) simulations. It was found that 1,6‐hexanediol diacrylate‐grafted POE (POE‐g‐HD) facilitated the reduction of the flow marks under an optimized grafting condition, a screw speed of 250 rpm at 185°C. The DPD simulations indicated that the reduction of the flow marks via POE‐g‐HD was related to the emergence of POE‐g‐HD quasi‐clusters. In addition, increasing melt strength of PP resulted in a melt fracture phenomenon and an increase of the flow marks. The limiting grafting degree of POE led to a finite reduction of the flow marks.

show abstract

Morphology evolution of a thermotropic liquid‐crystalline polymer in a polyamide 6,6 matrix regulated by graphene

Cited by 5 publications

References 50 publications

The Preparation of Monomer Casting Polyamide 6/Thermotropic Liquid Crystalline Polymer Composite Materials with Satisfactory Miscibility

The Preparation of Monomer Casting Polyamide 6/Thermotropic Liquid Crystalline Polymer Composite Materials with Satisfactory Miscibility

Programmable liquid crystal elastomer matrix through photomechanical responses

In‐situ grafted POE for reduction of flow marks on injection molding of PP

Contact Info

Product

Resources

About