Polymer Journals

Polymers and Polymer Composites

Logged into APC, CP, IPSAT, PPC, PRR, RRR & PRPRT.

Back  Search



Title: ABRASION RESISTANCE OF CONCRETE CONTAINING POLYOLEFIN FIBERS AND SILICA FUMES
Page Range: p.437-442
Author(s): An Cheng; Wei-Ting Lin
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
This project is aimed to evaluate the abrasion resistance of cement-based composites which comprise polyolefin fibres and silica fume in the mixes. Material variables include water-binder ratio, dosage of silica fume and dosage of polyolefin fibre. Compressive strength, splitting tensile strength and abrasion tests were conducted and discussed. Test results indicate that the inclusion of polyolefin fibre or silica fume in cement-based composites not only increases the compressive strength and splitting tensile strength but also decreases the abrasion loss. The silica fume plays a positive rule on growth of compressive strength, splitting strength and abrasion resistance of cement-based composites due to the pozzolanic and filler effect. However, the distribution of fibres could not be controlled, resulting in a notable lack of uniformity in the specimens. The combination of silica fume and polyolefin fibre improves the strength properties and abrasion resistance than only use of polyolefin fibre. In addition, the modified Los Angeles abrasion test used in this study is suitable for the evaluation of abrasion resistance in cement-based composites. By regression analysis, the good correlations are found between compressive strength and splitting strength, abrasion ratio and compressive strength, and abrasion ratio and splitting strength. 12 Refs.

Title: ADSORPTION PROPERTIES OF CROSSLINKED STARCH MICROSPHERES TOWARD PYRIDINE
Page Range: p.443-448
Author(s): Zongcheng Miao; Yang Zhao; Xiaoping Huo; Lei Wang; Zhongjin Li
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
The adsorption of pyridine onto crosslinked starch microspheres (CSMs) was investigated by experimental and theoretical methods. The adsorption capacity of CSMs towards pyridine increases with the increasing of pyridine concentration, and by lowering the temperature, adsorption would be accelerated. The adsorption behaviour of CSMs to pyridine is in agreement with the Langmuir isothermal equation. The research results show that the adsorption process is exothermic, and the adsorption force mainly derives from enthalpy changes. The thermodynamic parameters of adsorption process show that the adsorption behaviour of CSMs towards pyridine is of a physical type. 17 Refs.

Title: NOVEL SUPERABSORBENT COMPOSITE (AA-G-XG/OMMT) AND APPLICATION IN SANDY SOIL
Page Range: p.449-452
Author(s): Zongcheng Miao; Lei Wang; Yuzhen Zhao; Pengxia Liang; Zhongjin Li
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
In order to develop an environmentally friendly polymer, a novel superabsorbent composite (SAC) was prepared by graft copolymerisation of acrylic acid (AA) onto xanthan gum (XG) and then hybridisation with organic montmorillonite (OMMT) by hexadecyl trimethyl ammonium bromide. The characterisation of the SAC was confirmed by FTIR, SEM and DSC. Moreover, the water-retention characteristics of the composite were further studied. The results showed that the synthesised composite effectively increased the water-retention capacity. Therefore, this new composite could be considered as an excellent candidate for various industrial applications. 15 Refs.

Title: PREPARATION AND THERMAL CONDUCTIVITY OF NICKEL FIBER (POWDER)/SILICONE RUBBER COMPOSITES INDUCED BY MAGNETIC FIELD
Page Range: p.453-458
Author(s): Dongsheng Xie; Xianfeng Meng; Jie Ma; Lin Zhu; Xiangqian Shen
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
Silicone rubber composites filled with Ni powder (fibre) were successfully prepared, and the effect of fillers and magnetic field on the thermal conductivity of composite was investigated. The results showed that with the increasing of volume content of fillers, the thermal conductivity of composite increases. The Maxwell model and Cheng-Vachon equation were used to predict the thermal conductivity to explain the effect of Ni powder (fibre) fillers on the formation of thermal conductive networks. The SEM results indicated that aligned linetypelike structure had formed under magnetic field. Therefore, the presence of magnetic field during curing process could significantly enhance the thermal conductivity of composite. 19 Refs.

Title: EXPERIMENTAL STUDY OF EPOXY RESIN REPAIRING OF CRACKS IN FRACTURED ROCKS
Page Range: p.459-466
Author(s): Huige Xing; Xingguo Yang; Yuhui Dang; Xin Yao; Jiawen Zhou
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
Cracks in rock mass have always posed a big threat on the durability of fractured rocks in shear zone. Cracking of rock mass in shear zone is a random process, highly variable and influenced by many factors. Cracks in fractured rocks can be repaired by injection of epoxy resin in order to bond the crack and restore its structural integrity. Epoxy resins are used to repairing the shear zone at the Jinping Hydropower Station. An improved polymer grouting material is adopted and the polymerisation process is determined. The polymer grouting materials is consisted of resin (component A) and hardener (component B). Polarizing microscopy (PM) tests and mechanical experiments are adopted to evaluate the filling situation of epoxy resin in rock and the mechanical properties of epoxy-repaired rock, respectively. Experimental test results show that, the cracks and pores are filled by epoxy resin, and also the crack surface are boned. The mechanical properties of epoxy-repaired rock are improved by the polymer grouting and the permeability coefficient is decreased. 15 Refs.

Title: DISPERSION OF PRISTINE CNT IN UHMWPE SOLUTION TO PREPARE CNT/UHMWPE COMPOSITE FIBER
Page Range: p.467-470
Author(s): Xiangyang Hao; An-Ting Chien; Xiaoying Hua; Jian Lu; Yaodong Liu
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
CNT dispersion in polymer matrices uniformly remains a challenge. Uniform dispersion of carbon nanotube (CNT) within ultra-high molecular polyethylene (UHMWPE) solution is the first step to achieve CNT/UHMWPE fibres with excellent properties. Several approaches have been tried. Composite powder was acquired by coating CNT on UHMWPE powder, then, dissolved in decalin, through gel-spinning, higher stronger composite fibre is fabricated. 12 Refs.

Title: SYNTHESIS AND PROPERTIES OF PHENYLMETHYLSILICONE/ORGANIC MONTMORILLONITE NANOCOMPOSITES BY IN-SITU INTERCALATIVE POLYMERIZATION
Page Range: p.471-476
Author(s): Xinhua Yuan; Wenhua Guo; Xiao Jiang; Yongqiang Liu; Shulin Pan; Jie Hu; Songjun Li
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
Using methylphenyl dichlorosilane, methyl trichlorosilane cetyltrimethylammonium bromide (CTAB) as organic treatment agent, phenylmethylsilicone/organic montmorillonite (OMMT) nanocomposites were prepared by in-situ intercalative polymerisation. The internal structure and morphology of the nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). Mechanical properties, high temperature resistance and barrier performance for gas and water were also studied. The results show that molecules of silicone chains insert into the layer of montmorillonite (MMT), and the interlayer distance of MMT is expanded effectively after polymerisation of phenylmethylsilicone prepolymer and methyl methacrylate, even forming exfoliated nanocomposites. 12 Refs.

Title: EFFECT OF SIC VOLUME FRACTION ON PROPERTIES OF SIC/6061 COMPOSITES
Page Range: p.477-482
Author(s): Yan Li-peng; Wang Ai-qin; Xie Jing-pei; Hao Shi-ming
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
The SiC/6061 composites were produced by powder metallurgy method, with the SiC particle volume fraction being 20%, 25%, 30% respectively. The microstructures of the materials were observed by Optical Microscope. The tensile strength and Coefficient of thermal expansion (CTE) were examined. Turner and Kerner theoretical models were employed to analyse the CTE. The influences of the SiC particles volume fraction on the microstructures and performances were analysed. The results show that with the increase of the SiC particles volume fraction in the composites, the clustering degree of the SiC particles increases in the matrix, and the CTE decreases which is close to the average of the Kerner and Turner theoretical model predictions, and the tensile strength increases but when the volume fraction of SiC particles exceeds the critical value of 30% the tensile strength of the composite decreases. And the strengthening mechanism of experimental materials was discussed. 21 Refs.

Title: NUMERICAL SIMULATION OF MODE-II FRACTURE OF CFRP WITH TOUGHENING INTERLAYER USING BILINEAR COHESIVE ZONE MODEL
Page Range: p.483-488
Author(s): Guowei Zhu; Peng Qu; Yunli Guo; Gang Liu; Xiaosu Yi; Yuxi Jia
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
The effect of interfacial toughening porous non-woven fabric (PNF) on the Mode-II fracture toughness (GIIC) of carbon fibre reinforced polymer is studied by performing end notched flexure tests. The PNF with a thickness of 10 (mu)m is selected as the interleaf material, which is modelled by the bilinear cohesive zone model. The vertical displacement of loading points and the corresponding force are measured. The influences of the cohesive shear strength and GIIC of the toughening interlayer on the mechanical response of composites are studied. The main results are obtained as follows. The peak load increases with the increase of the cohesive shear strength, but the increasing amplitude is gradually reduced. Once the delamination propagates steadily, the influence of the cohesive shear strength can be neglected, and at the moment, GIIC of toughening interlayer plays a leading role. Furthermore, the greater GIIC of toughening interlayer is, the greater GIIC of composites and peak load are. 9 Refs.

Title: SYNTHESIS OF MONTMORILLONITE/ACRYLIC ACID/ACRYLAMIDE TRICOPOLYMER AND ITS SUPER ABSORBENT PROPERTIES
Page Range: p.489-494
Author(s): Xiao-yuan Zhan; Fang Wang; Xing-wei Li; Min Wang
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.5

Abstract
Montmorillonite/acrylic acid/acrylamide tricopolymer was synthesised by using aqueous solution polymerisation. Some factors affecting the water absorbency of super absorbent composite material, such as the neutralisation of acrylic acid, the amount of added montmorillonite, initiator and crosslinking agent were investigated. The best formula for absorbing the running water was proposed, it included 40% montmorillonite, 80% monomer neutralisation degree, 0.08% crosslinker amount, and 0.15% initiator, and the water absorbency of the obtained composite materials was 150 times. The FTIR research indicated that montmorillonite was effectively compounded with polymer, it is found that the composite with a good water retention and heat resistance is significant for reducing the product cost and improving the comprehensive property of the composite. 10 Refs.

%>