Transesterification-controlled compatibility and microfibrillation in PC–ABS composites reinforced by phosphorus-containing thermotropic liquid crystalline polyester

Chen, Li; Huang, Heng-Zhen; Wang, Yu‐Zhong; Jow, Jinder; Su, Kenny

doi:10.1016/j.polymer.2009.04.026

Cited by 30 publications

(18 citation statements)

References 39 publications

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“…In general, a PC resin achieves V-2 rating in the UL-94 test; however, PC/ABS alloys are easy combustible. The addition of FRs is an effective method to improve the flame retardancy of PC/ABS alloys [3,4]. However, owing to environmental concerns, some highefficiency halogen-containing FRs have been gradually limited; therefore, halogen-free FRs based on phosphorus and nitrogen have been well developed in recent decades.…”

Section: Introductionmentioning

confidence: 99%

Flame retardancy and toughness modification of flame retardant polycarbonate/acrylonitrile-butadiene-styrene/AHP composites

Lang

2016

Polymer Degradation and Stability

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Section: Introductionmentioning

confidence: 99%

Flame retardancy and toughness modification of flame retardant polycarbonate/acrylonitrile-butadiene-styrene/AHP composites

Lang

2016

Polymer Degradation and Stability

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“…The composition of the residual carbon was analyzed, and the internal structure of the carbonaceous material was analyzed by Raman spectroscopy. In general, the D band was identified as amorphous carbon and the G band was identified as sp 2 hybrid ordered carbon . The peak at 1360 cm ‑1 was assigned to the D band, and the peak at 1590 cm ‑1 was assigned to the G band.…”

Section: Results and Discusstionmentioning

confidence: 99%

“…In general, the D band was identified as amorphous carbon and the G band was identified as sp 2 hybrid ordered carbon. 45,46 The peak at 1360 cm -1 was assigned to the D band, and the peak at 1590 cm -1 was assigned to the G band.…”

Section: Char Residues Analysismentioning

confidence: 99%

A novel nitrogen, phosphorus, and boron ionic pair compound toward fire safety and mechanical enhancement effect for epoxy resin

Tang

Zhou

2019

Polymers for Advanced Techs

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In this work, a novel nitrogen, phosphorus and boron ionic pair compound (DTPA[AZB]), composed of a protonated flame retardant (DTPA) 6,6'‐(1,4‐phenylenebis((pyrazin‐2‐ylamino)methylene))bis(dibenzo[c,e][1,2]oxaphosphinine 6‐oxide) and a counter anion alizarin borate (AZB), has been prepared and fully characterized, AZB was synthesized by the reaction of alizarin with boric acid. DTPA was produced in two steps. First, terephthalaldehyde was condensed with aminopyrazine to form the corresponding imine. This was treated with 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) to generate DTPA. Blending with DTPA greatly reduced the flammability of epoxy resin. When the amount of DTPA added was 4%, a modified epoxy resin passed the V‐0 rating and the limiting oxygen index (LOI) reached 32.5%. With the introduction of 3% AZB into the EP/DTPA material, the LOI reached 33.5%. Simultaneously, compared with that of neat EP, the peak heat release rate and smoke production rate for EP/DTPA‐4 was decreased by 24.1% and 40.7%, respectively, and the peak heat release rate and smoke production rate for EP/DTPA[AZB]‐3 was decreased by 32.9% and 43.4%, respectively. The results indicate that AZB and DTPA show good cooperative flame retardant effects. The flame retardancy of the modified epoxy is improved with greater heat release suppression combustion of the resin. A mode of flame retardant action has been proposed based on analysis results from Py‐GC/MS for DTPA, and SEM, IR and Raman for the residual carbon from cone calorimeter and UL‐94 tests, respectively. Importantly, the tensile strength, fexural strength, and fexural modulus of the EP/DTPA[AZB] increased compared with the same properties of neat EP.

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“…The blending of TLCPs with commercial thermoplastics, such as polyethylene (PE), polypropylene (PP), polycarbonate (PC), poly(ethylene terephthalate) (PET), etc., has been known to lead to viscosity reductions, an improved processability, and enhanced mechanical and barrier properties [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Chan et al investigated the flow-induced chain alignment and disentanglement of TLCP/high density polyethylene (HDPE) blends and proposed a mechanism elucidating the viscosity reducing effects of the incorporation of TLCP as a processing aid into the HDPE matrix [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Poly(ethylene-co-glycidyl methacrylate) on the Microstructure, Thermal, Rheological, and Mechanical Properties of Thermotropic Liquid Crystalline Polyester Blends

et al. 2020

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In this study, a series of thermotropic liquid crystalline polyester (TLCP)-based blends containing 1–30 wt% poly(ethylene-co-glycidyl methacrylate) (PEGMA) were fabricated by masterbatch-assisted melt-compounding. The scanning electron microscopy (SEM) images showed a uniformly dispersed microfibrillar structure for the TLCP component in cryogenically-fractured blends, without any phase-separated domains. The FT-IR spectra showed that the carbonyl stretching bands of TLCP/PEGMA blends shifted to higher wavenumbers, suggesting the presence of specific interactions and/or grafting reactions between carboxyl/hydroxyl groups of TLCP and glycidyl methacrylate groups of PEGMA. Accordingly, the melting and crystallization temperatures of the PEGMA component in the blends were greatly lowered compared to the TLCP component. The thermal decomposition peak temperatures of the PEGMA and TLCP components in the blends were characterized as higher than those of neat PEGMA and neat TLCP, respectively. From the rheological data collected at 300 °C, the shear moduli and complex viscosities for the blend with 30 wt% PEGMA were found to be much higher than those of neat PEGMA, which supports the existence of PEGMA-g-TLCP formed during the melt-compounding. The dynamic mechanical thermal analysis (DMA) analyses demonstrated that the storage moduli of the blends decreased slightly with the PEGMA content up to 3 wt%, increased at the PEGMA content of 5 wt%, and decreased again at PEGMA contents above 7 wt%. The maximum storage moduli for the blend with 5 wt% PEGMA are interpreted to be due to the reinforcing effect of PEGMA-g-TLCP copolymers.

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Transesterification-controlled compatibility and microfibrillation in PC–ABS composites reinforced by phosphorus-containing thermotropic liquid crystalline polyester

Cited by 30 publications

References 39 publications

Flame retardancy and toughness modification of flame retardant polycarbonate/acrylonitrile-butadiene-styrene/AHP composites

Flame retardancy and toughness modification of flame retardant polycarbonate/acrylonitrile-butadiene-styrene/AHP composites

A novel nitrogen, phosphorus, and boron ionic pair compound toward fire safety and mechanical enhancement effect for epoxy resin

Effects of Poly(ethylene-co-glycidyl methacrylate) on the Microstructure, Thermal, Rheological, and Mechanical Properties of Thermotropic Liquid Crystalline Polyester Blends

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