Preparation and mechanical properties of TLCP/ UP / GF in-situ hybrid composites

Yu, Xianbao; Wei, Chun; Lu, Shaorong; Yu, Jinghong; Xu, Ding; Lu, Chihua

doi:10.1016/s1003-6326(06)60250-1

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…The TLCP used in this work is one kind reactive polyester TLCP whose liquid crystalline polymer (LCP) phase temperature is 230–262.2°C synthesized by us (The synthesis route is shown as step 1 in Scheme )14, 15; UP (molecular structure see step 2 in Scheme ), industrial products; GF (length: 5–6 mm, diameter: 10–13 μm), industrial product, curing agent (blend of styrene and peroxide), calcium carbonate, aluminum hydroxide, and zinc stearic as inorganic fillers are industrial products kindly provided by Guangdong Fuxing Materials Plant, China.…”

Section: Methodsmentioning

confidence: 99%

Clinical outcomes for patients with soft tissue sarcoma of the hand

Puhaindran

Rohde

Chou

et al. 2010

Cancer

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BACKGROUND:In an earlier report from the current study center regarding surgical treatment for patients with soft tissue sarcoma (STS) of the hand, it was concluded that repeat resection or amputation improves outcomes. Since then, the authors have aggressively sought to achieve negative resection margins, using standard or modified amputations when needed, and performing repeat resections to negative surgical margins when they were not achieved at the time of initial surgery. The current review was conducted to determine whether this approach resulted in better outcomes. METHODS: A retrospective review of 53 patients with STS of the hand who were treated between 1996 and 2005 was performed. Recurrence-free survival (RFS) and functional outcome of hand-preserving procedures were assessed according to the Musculoskeletal Tumor Society (MSTS) system. RESULTS: The median RFS was not reached at the time of last follow-up. Of 53 patients, 6 (11%) had positive microscopic resection margins. Three patients underwent repeat resection to negative surgical margins, whereas another 3 patients did not. All 3 patients with positive microscopic surgical margins that were not re-excised developed local disease recurrence; 2 patients also developed distant metastases. Two of the 50 patients with negative resection margins developed distant metastases. All 5 patients who developed local and/or distant disease recurrence had deep tumors. The median MSTS score was 29 (interquartile range, 27-30). Patients who underwent more extensive resections, such as double ray amputations, had lower MSTS scores. CONCLUSIONS: Suboptimal biopsies and positive resection margins are associated with local and distant disease recurrence in patients with STS. The results of the current study suggest that aggressive surgical treatment can result in better clinical outcomes, and underscore that care must be taken when planning biopsies of hand tumors. Cancer 2011;117:175-9.

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Section: Methodsmentioning

confidence: 99%

Clinical outcomes for patients with soft tissue sarcoma of the hand

Puhaindran

Rohde

Chou

et al. 2010

Cancer

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“…[10,12]; Unsaturated polyester, industrial products; glass fiber (length: 5∼6 mm, diameter: 10-13 m), industrial product, curing agent (a blend of styrene and peroxide), calcium carbonate, aluminum hydroxide and zinc stearic as inorganic fillers are industrial products kindly provided by Guangdong Fuxing Materials Plant, China. Dynamic mechanical properties are measured by DMA Q800 (TA Instruments), specimen dimension is 20 mm × 10 mm × 1.2 mm, measurement frequency is 1 Hz; Thermal expansion coefficient of the composite is measured by NETZSCH Dilatometry (model: DIL 402C); Rheological properties are measured by SHIMADZU CFT-500D capillary reometer at 160 C; The crystal behavior of UP, LCMC and UP/LCMC blend is analyzed by X-ray diffractory (XRD) (model: Panalytic X'Pert Pro, Netherlands); Optical anisotropies of UP and UP/LCMC blends are observed by Olympus BH-2 polarizing optical microscope (POM) equipped with a heating stage.…”

Section: Materials and Measurementsmentioning

confidence: 99%

“…In our previous works, the synthesis and characterization of LCMC, 10 are focused. The crystal behavior and texture structure of LCMC/UP blends are determined by POM and XRD.…”

Section: Introductionmentioning

confidence: 99%

Rheological, Dynamic Mechanical and Thermal Properties of Thermotropic Liquid Crystalline Polymer/Unsaturated Polyester/Glass Fiber Hybrid Composites

Wei¹,

Yu²,

Lv³

et al. 2008

Jnl of Comp & Theo Nano

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Unsaturated polyester (UP) reinforced with self-synthesized reactive thermotropic liquid crystalline polymer (TLCP)-methacryloyl copolymer (LCMC) and glass fiber (GF), the hybrid composites of UP/GF/LCMC are prepared by molding technology. The dynamic mechanical analysis (DMA) indicate that storage modulus and glass transition temperature (T g ) of hybrid composites increase significantly because of the addition of LCMC. The thermal expansion coefficient of composites containing 5% LCMC decrease by about 30% than that of composites without LCMC. Rheological performance analysis show that the composites under melting stage are non-Newton liquid of shear thinning, and the processability of composites with 5% LCMC can be improved effectively. The crystal behavior analysis of LCMC/UP blend is investigated by X-ray diffraction (XRD) and polarizing optical microscope (POM). The results show that the crystal phase and texture structure of LCMC still exist in the blends after blending with UP.

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“…The TLCP used in this work is one kind reactive polyester TLCP whose liquid crystalline polymer (LCP) phase temperature is 230-262.28C synthesized by us (The synthesis route is shown as step 1 in Scheme 1) 14,15 ; UP (molecular structure see step 2 in Scheme 1), industrial products; GF (length: 5-6 mm, diameter: 10-13 mm), industrial product, curing agent (blend of styrene and peroxide), calcium carbonate, aluminum hydroxide, and zinc stearic as inorganic fillers are industrial products kindly provided by Guangdong Fuxing Materials Plant, China.…”

Section: Materials and Measurementsmentioning

confidence: 99%

Wear and mechanical properties of reactive thermotropic liquid crystalline polymer/unsaturated polyester/glass fiber hybrid composites

Wei

et al. 2006

J of Applied Polymer Sci

Self Cite

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To improve the performance of unsaturated polyester (UP) under cold-heat alternate temperature, selfsynthesized reactive thermotropic liquid crystalline polymer (TLCP)-methacryloyl copolymer (LCMC), UP, and glass fiber (GF) hybrid composites was prepared by molding technology. The apparent activation energy and crystal behavior analysis of LCMC/UP blends were investigated by Differential scanning calorimetry and X-ray diffraction (XRD), respectively, the results showed that the addition of LCMC can reduce apparent activation energy and accelerate the curing reaction of UP, the XRD analysis indicated that the crystal phase of LCMC still exist in the blends after blending with UP. The effect of LCMC content on the properties of LCMC/UP/GF hybrid composites such as impact strength, bending strength, and ring-on-block wear were also investigated through static mechanical tests and wear tests. The mechanical properties of hybrid composites increased significantly because of the addition of LCMC. The wear tests showed that LCMC can improve the wear resistance of the UP/GF/LCMC hybrid composites even though the content of LCMC was at a relatively low level (5-7.5 wt %). This makes it possible to develop novel kind of UP-based materials with good wear resistance for various applications. The Worn surface was observed by scanning electron microscopy (SEM) and the mechanism for the improvement is discussed in this paper.

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Preparation and mechanical properties of TLCP/ UP / GF in-situ hybrid composites

Cited by 11 publications

References 15 publications

Clinical outcomes for patients with soft tissue sarcoma of the hand

Clinical outcomes for patients with soft tissue sarcoma of the hand

Rheological, Dynamic Mechanical and Thermal Properties of Thermotropic Liquid Crystalline Polymer/Unsaturated Polyester/Glass Fiber Hybrid Composites

Wear and mechanical properties of reactive thermotropic liquid crystalline polymer/unsaturated polyester/glass fiber hybrid composites

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