Published 1992 by National Library of Canada = Bibliothèque nationale du Canada in Ottawa .
Written in EnglishRead online
|Series||Canadian theses = Thèses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative.|
Download Analysis of the pullout of single fibers from low-density polyethylene
Based on the observation and interpretation of single-fibre pull-out results of E-glass fibre from low density polyethylene, a new theoretical model, incorporating the concepts of critical transition length, ultimate shear strength and a deduced stress distribution, was developed to predict the relationship between the debonding force and embedded fibre length for a well Cited by: 2.
Electron‐beam‐initiated grafting of triallyl cyanurate onto polyethylene: Structure and properties. Tapan K. Chaki; Sanjoy Roy; R. Despande Analysis of the pullout of single fibers from low‐density polyethylene. Jian‐Xin Li; Pages: ; First Published: 11 July Analysis of ultrasonically induced free radicals in the.
This extreme anisotropic character in the case of oriented polyethylene can be understood from the so-called stiffness matrix of polyethylene. The complete stiffness matrix Cij and the compliance matrix Sij of perfect polyethylene (single) crystals, being the extreme case of a perfect fiber, were calculated by Tashiro et al.
The DMA behavior of the α-relaxation was studied in detail by Rong and Williams () on low density polyethylene (LDPE) fibers. This transition occurred at °C and as had been shown earlier; it depends most of all on the thickness of the crystallites (Popli et al., ).In Rong and Williams' paper, the β-relaxation took place at 10°C for low-density PE fiber (Fig.
), but it. The book starts with a historical discussion on how low density polyethylene was discovered and how it provided unique opportunities in the early days.
New catalysts are presented and show how they created an expansion in available products including linear low density polyethylene, high density polyethylene, copolymers, and polyethylene.
High Performance Polyethylene Fibers 95 Author's personal copy cooled melt) and (2) drawing of ﬁ bers at temperatures close to but below the melting or dissolution : Ton Peijs.
This handbook provides an exhaustive description of polyethylene. The 50+ chapters are written by some of the most experienced and prominent authors in the field, providing a truly unique view of polyethylene.
The book starts with a historical discussion on how low density polyethylene was discovered and how it provided unique opportunities in the early days. Al-Nasir:Study of the Mechanical properties of Low density polyethylene composites with 3.
The mechanical propertieow s of l density polyethylene shown in areFigure (3), where the stress strain curves of - polymer composite that reinforced with different ratios of hemp fiber. The fibers length range was (75 - ) microns. The. Plastic bag waste was recycled into fiber by melt spinning using laboratory scale melt spinning equipment with single orifice nozzle and plunger system.
Low Density Polyethylene. First polymer used in food-packaging Introduced in the s and became very popular in s Many different types Irregular structure Lower crystallinity: 40 to 60% Lower density: to g/cm3. Ultrahigh Molecular Weight Polyethylene (UHMPE) Fibers. High-modulus polyethylene fibers can be made by solid-state drawing of high-density polyethylene.
These fibers are limited to temperatures of °F or lower. The book starts with a historical discussion on how low density polyethylene was discovered and how it provided unique opportunities in the early days. New catalysts are presented and show how they created an expansion in available products including linear low density polyethylene, high density polyethylene, copolymers, and polyethylene /5(3).
Cross-ply Analysis of the pullout of single fibers from low-density polyethylene book made with fibers chopped to a length of 20 cm were found to be strongest peaking at around 40 wt.% with a tensile strength of.
Low-density polyethylene (LDPE) is a thermoplastic made from the monomer was the first grade of polyethylene, produced in by Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization.
Its manufacture employs the same method today. The EPA estimates % of LDPE (recycling number 4) is recycled in the United States. The microbond technique is a modification of the single-fiber pullout test for measuring interfacial shear strength. Briefly, a cured microdroplet of material is. The LDPE (Low Density Polyethylene) used as the starting matrix is Riblene MP 31 from Polimeri europa france, having a density of g/cm 3 and a melting temperature of °C.
Raw Doum fibers (Chamaerops humilis) with an average length of 25 cm were collected from rural areas of by: The aim of this work is to obtain and evaluate the mechanical and thermal properties of low Density Polyethylene (LDPE) composites reinforced with fibers from Australian King Palm fibers.
Raw fibers were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) Spectroscopy. The chemical composition of the fibers Cited by: 1. Low-density polyethylene is composed of primarily highly branched, non-linear chains of polyethylene in a diffuse packing arrangement the plastic material used to make transparent "throw-away" drinking cups and disposable coffee cups is.
The dried fiber was milled in a Thomas Wiley grinding machine and screened to obtain fiber dimension of about 2 mm in size, making it ready for mixing with the polyethylene pellets. The dried fibers were designated as untreated fibers.
The Low Density Polyethylene (LDPE) was supplied in pellet form by Sasol Polymers, Johannesburg, South by: 3. This paper investigates the high strain rate transverse compression behavior of Kevlar® KM2 and ultra high molecular weight polyethylene Dyneema® SK76 single fibers widely used in protective components under ballistic and blast loading conditions.
Cellulose fibers surface‐coated with butyl benzyl phthalate (BBP)‐plasticized PVC were evaluated as a reinforcement in thermoplastic matrices. Coated fibers were agglomerated during compounding with polypropylene. A single‐filament pull‐out test was used to study adhesion of Kevlar‐49 fibers to thermoplastic polymers.
The test involved pulling a partially embedded fiber out of a polymer film. Kevlar‐49 fibers with three different surface treatments were used with five thermoplastic by: Polymers, an international, peer-reviewed Open Access journal. Dear Colleagues, Thermal analysis is an important characterization tool in the field of materials sciences because specific physico-chemical properties of synthetic polymers, bio-based polymers, nanomaterials, materials and biomaterials can be determined through thermal analysis.
Articles such as vests, helmets and structural elements containing a network of ultrahigh molecular weight, high strength, high modulus polyethylene or polypropylene fibers.
The fibers, and especially polyethylene fibers of 15, 20, 25, 30 or more g/denier tenacity, and,or more g/denier tensile modulus impart exceptional ballistic resistance to the Cited by: 1 Polyethylene Product & Market Guide ASPUN™ Fiber Grade Resins Excellent softness and drape; low melting point; good adhesion to polyethylene and polypropylene films.
ATTANE™ Ultra Low Density Polyethylene Resins Excellent combination of softness, clarity, gloss, and cling, with low temperature flexibility and high flex crack resistance. Low density polyethylene film is drawn at room temperature four times the original length and subjected to thermal annealing at 60, 80, and °C keeping the film length constant.
Long spacing measured by SAXS increased with increasing temperature of annealing; the increase of the long spacing is presumed to be due to the decrease of the number of Cited by: 8. List of synthetic polymers by Synthetic polymers are human-made polymers derived from petroleum oil.
This guide explains about the eight most common types of synthetic organic polymers, which are commonly found in households are: Low-density polyethylene, High-density polyethylene, Polypropylene, Polyvinyl chloride, Polystyrene, Nylon, nylon 6.
The solid superacid-catalyzed depolymerization−liquefaction (DL) reactions of high-density polyethylene (HDPE), isotactic polypropylene (PPR), and cis-polybutadiene (PB) samples were systematically investigated as a function of processing conditions, i.e., temperature (− °C), time (− h), H2 pressure (− psig), catalyst type and concentration, and the.
The interfacial shear strength as measured by the modified single-fiber pull-out test indicated that the overall average interfacial shear strength was highest in PP and lowest in LDPE.
ISO-bonded LDPE without E treatment showed the highest interfacial shear Cited by: 6. Abstract: The Interface of sisal fiber which was treated by using alkali, potassium permanganate, atmospheric plasma and silane reinforced polypropylene composites were investigated by single fiber pull-out testes and surface morphology were studied.
The results indicated that the morphological changes observed on the sisal fiber surface were obviously by: 1. This present chapter describes the manufacturing technique and properties of coir fibre-reinforced polypropylene composites manufactured using a hot press machine.
The effects of basic chromium sulphate and sodium bicarbonate treatment on the physical and mechanical properties were also by: 3. Figures 3, 4 offer the reader a more specific comparison of glass and natural fiber performance by limiting the input range specifically to injection molded 30 wt% fiber reinforced polypropylene with the glass fiber results split between long-fiber (pultrusion compounded) and short-fiber (extrusion compounded) performance.
The data for NI-TM clearly indicate that glass fiber Cited by: 3. By Robert M. Koerner The GMA Techline was initiated on Sept. 1,as a free worldwide answer center for questions involving any, or all, aspects of geosynthetics. There were no constraints put on the questioners, or on the answers that were provided by the Geosynthetic Institute (GSI).
To date, 3, Q and As have The GMA Techline. The fiber matrix interfacial morphology of the tensile fractured specimens was studied using scanning electron microscopy (SEM) which showed less fiber pullout and comparatively less gaps between the fiber and the base matrix in the case of MAPP treated hybrid by: • This interaction is so weak that for strong fibers, ultra-long chains with a high overlap lengths are required.
• Thus starting material for the high-performance polyethylene fibers is polyethylene with an average molecular weight of one million or more Gel Spinning • The molecules are dissolved in a solvent and spun through a Size: 3MB.
For common commercial grades of medium- and high-density polyethylene the melting point is typically in the range to °C ( to °F). The melting point for average, commercial, low-density polyethylene is typically to °C ( to °F). These temperatures vary strongly with the type of iations: PE. Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications.
It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and properties are similar to polyethylene, but it is slightly harder and more heat al formula: (C₃H₆)ₙ.
ABSTRACT Investigation of Interfacial Bonding in Banana Fiber-Reinforced Composites: Ascribing Global Economic Value to Unique Renewable Resources in Developing Countries. The first polyethylene, later called LDPE, was and is made by a high pressure process using a free radical initiator/catalyst and is a polymer with a high degree of chain branching.
Subsequently low pressure processes using Ziegler-Natta or related catalysts were developed which produce a much more linear molecule and generally higher. Materials.
Table 1 and and2 2 show the polymer materials, nonmetallic PCBs and the blends system used in this study, respectively. The recycled HDPE (rHDPE) was supplied by a local recycling company in Johor, METAHUB Industries Sdn Bhd. The Maleic anhydride modified linear low-density polyethylene (MAPE) compatibilizer used was OREVAC® Cited by:.
Linear low-density polyethylene (LLDPE) is a substantially linear polymer (polyethylene), with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain low-density polyethylene differs structurally from conventional low-density polyethylene (LDPE) because of the absence of long chain branching.Composite production.
The composites were fabricated using compression moulding technique. Samples were produced at °C. The composite samples were developed by compounding 2, 4, 6, 8 and 10 wt. % of the bamboo fibres with HDPE matrix with the aid a single screw laboratory extruder at a temperature of – ° by: 2.ize the interface of reinforced composites, namely, the single-fiber fragmentation test (Tai et al.ShalerFelix and Gatenholm ), the single-fiber pull-out test (Wester-lind et al.
), and the microbond test (Miller et al.Sanadi Cited by: 6.