UV aging resistance properties of PBO fiber coated with nano-ZnO hybrid sizing

2010 ◽  
Vol 120 (4) ◽  
pp. 2468-2476 ◽  
Author(s):  
Chun-Hua Zhang ◽  
Yu-Dong Huang ◽  
Wen-Jing Yuan ◽  
Jian-Nan Zhang
Keyword(s):  
Uv Aging ◽  
Nano Zno ◽  
Aging Resistance ◽  
Pbo Fiber

scholarly journals An Important Factor Affecting the UV Aging Resistance of PBO Fiber Foped with Nano-TiO2: The Number of Amorphous Regions

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 869
Author(s):  
Jiping Liu ◽  
Xiaobo Liu ◽  
Dong Wang ◽  
Hu Wang
Keyword(s):  
Thermal Decomposition ◽  
Wet Spinning ◽  
Nano Tio2 ◽  
Uv Aging ◽  
Tio2 Particles ◽  
Aging Resistance ◽  
Pbo Fiber ◽  
Tio2 Addition ◽  
Resistance Performance ◽  
Derivative Thermogravimetry

Modified nano-TiO2 was prepared by using triethanolamine and tetraisopropyl di (dioctylphosphate) titanate, respectively. Then the poly(p-phenylene benzobisoxazole) (PBO) fibers doped with different additions of modified nano-TiO2 particles were prepared by preparing PBO polymer solution and dry-jet wet spinning technique. Thermogravimetric and derivative thermogravimetry results showed that the addition of nano-TiO2 could improve the crystallinity and maximum thermal decomposition rate temperature of PBO fibers. Tensile strength results showed that nano-TiO2 addition did not affect the tensile properties of PBO fibers before ultraviolet (UV) aging began, and nano-TiO2 with addition values lower than 3% could improve the UV aging resistance performance of PBO fibers, while the aging resistance would be seriously reduced if values were over 5%. The size and quantity of the amorphous regions have a more important influence on the aging resistance of PBO fibers.

UV-Aging Resistance of Packaging Waste PE Modified Asphalts

2009 ◽  
Vol 48 (9) ◽  
pp. 945-949 ◽  
Author(s):  
Changqing Fang ◽  
Maorong Zhang ◽  
Zengping Zhang ◽  
Shisheng Zhou
Keyword(s):  
Uv Aging ◽  
Packaging Waste ◽  
Aging Resistance

UV Aging Performance of Asphalt Containing LDHs

2014 ◽  
Vol 599 ◽  
pp. 265-270 ◽  
Author(s):  
Pan Fei Liu ◽  
Jun Zheng ◽  
Shao Peng Wu
Keyword(s):  
Aging Process ◽  
Complex Modulus ◽  
Short Term ◽  
Uv Aging ◽  
Oven Test ◽  
Aging Properties ◽  
Aging Resistance ◽  
Before And After ◽  
Double Hydroxides

In this paper the effect of Layered double hydroxides (LDHs) on aging properties of asphalts was studied. The thin film oven test TFOT tests and ultraviolet (UV) aging process were used to simulate short-term and long-term aging of asphalts, respectively. After aging, the physical properties and dynamic shear rheological behaviors of LDHs modified asphalts were investigated. The viscosity of LDHs modified asphalts was measured by Brookfield viscometer before and after UV aging. After UV aging, with an increase of LDHs, softening point and viscosity value of modified asphalts decreased, while both of ductility and penetration increased, compared to base asphalts. Temperature sweep tests showed that the complex modulus of LDHs modified asphalts was lower than that of base asphalt, while phase angle was higher. The results showed that LDHs improved the UV aging resistance of the asphalt, and it could prevent asphalt from UV aging.

Effect of Layered Double Hydroxides with Different Particle Size on Properties of Bitumen

2018 ◽  
Vol 913 ◽  
pp. 1062-1069
Author(s):  
Min Wu ◽  
Lian Li ◽  
Bian Yang He ◽  
Jian Ying Yu
Keyword(s):  
Particle Size ◽  
Physical Properties ◽  
Rheological Properties ◽  
Layered Double Hydroxides ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Uv Aging ◽  
Aging Resistance ◽  
Microscopic Morphology ◽  
Double Hydroxides

The crystal structure, microscopic morphology, particle size distribution and UV shielding properties of layered double hydroxides (LDHs) with different particle size were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size analysis and ultraviolet and visible (UV-vis) spectrophotometer. The effects of LDHs with different particle size on the physical, rheological properties and UV aging resistance of bitumen were investigated by conventional physical properties and dynamic rheological characteristics. The results indicated that the particle size of LDHs had a little effect on the physical properties, and it had some influence on rheological properties of bitumen, but its influence on the UV aging resistance of bitumen was different significantly. When UV aging time was 9d, the viscosity aging indexes of bitumen modified by LDHs with different particle size (80nm, 115nm and 180nm) decreased by 48.2%, 58.1% and 63.8% compared with the pristine bitumen, respectively. LDHs with the particle size of 180 nm showed better improvement than other two kinds of LDHs on UV aging resistance of bitumen.

Effect of silane-functionalized TiO2 on the optical properties and moisture barrier of silicone resin nanocomposites

RSC Advances ◽  
2014 ◽  
Vol 4 (73) ◽  
pp. 38614-38622 ◽  
Author(s):  
Wei-Hao Liao ◽  
Sheng-Tsung Hsiao ◽  
Yi-Fang Wu ◽  
Shi-Jun Zeng ◽  
Shin-Ming Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silicone Resin ◽  
High Moisture ◽  
Uv Aging ◽  
Moisture Barrier ◽  
High Transparency ◽  
Aging Resistance

An effective approach for fabricating silane-functionalized TiO2 nanoparticles/silicone resin (SR) composites that exhibit high transparency, high refractive indexes (RIs), high UV aging resistance, and high moisture barrier.

Synthesis of Chitosan-based Polymer Carbon Dots Fluorescent Materials and Their UV Aging Resistance Properties for Paper

2017 ◽  
Vol 38 (11) ◽  
pp. 1443-1449
Author(s):  
于淑娟 YU Shu-juan ◽  
汪 丰 WANG Feng ◽  
罗振静 LUO Zhen-jing ◽  
朱永飞 ZHU Yong-fei
Keyword(s):  
Carbon Dots ◽  
Uv Aging ◽  
Fluorescent Materials ◽  
Aging Resistance
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