EVALUATION OF HOT- GAS AND HEATED TOOL WELDMENTS OF POLYPROPYLENE/BONE PARTICULATE COMPOSITES


For more Metallurgical & Materials Engineering project click here



TABLE OF CONTENTS

Title Page
Abstract
Table of Content
List of Abbreviations

CHAPTER ONE: INTRODUCTION
1.1Statement of the Problem
1.2 Aim and Objectives of the Study
1.3 Significance of the Study
1.4 Scope and Limitation of the Research

CHAPTER TWO: LITERATURE REVIEW
2.1 Polymers and Polymer Composites
2.1.1Classification of polymers
2.2.1. Polypropylene
2.2.2. Chemical and physical properties of polypropylene
2.2.3. Polymer additives
2.2.4. Bone particles
2.2.5. Composite materials
2.2.6. Classification of composites
2.2.7. Classification based on reinforcement
2.2.8. Classification based on matrix
2.2.9. Design considerations in composites
2.2.10. Properties and testing of composites
2.2.11. Applications of polymer composites
2.3 Welding of Plastics and Plastic Composites
2.3.1. Fusion bonding
2.3.2. Thermal welding
2.3.3. Friction welding
2.3.4. Electromagnetic welding
2.4.0. Review of the previous literatures

CHAPTER THREE: MATERIALS AND METHODS
3.1. Materials
3.2. Equipment
3.3. Experimental Methods
3.3.1. Bone procurement and treatment
3.3.2. Bone degreasing
3.3.3.Sieving of bone
3.3.4. Compounding of mix
3.3.5. Cutting
3.4. Welding of Composite
3.4.1. Hot gas welding
3.4.2. Heated tool welding
3.5. Testing of Composites
3.5.1. Density determination
3.5.2. Water absorption test
3.5.3. Tensile test
3.5.4. Flexural/bend test
3.5.5. Hardness test
3.5.6. Impact test
3.5.7. Scanning Electron Microscopy (SEM)
3.5.8. Soil burial test

CHAPTER FOUR: RESULTS AND DISCUSSIONS
4.1       Introduction
4.2       Result of Density Test
4.3       Result of Water Absorption Test
4.4       Result of Tensile Strength Test
4.5       Percentage Elongation
4.6       Result of Flexural Strength Test
4.7       Result of Impact Energy Test
4.8       Result of Hardness Test
4.9       Result of Soil Burial Test
4.10     Scanning Electron Microscopy (SEM) Images

CHAPTER FIVE: CONCLUSIONS AND RECOMMENDATIONS
5.1       Conclusions
5.2       Recommendations
5.3       Contributions to Knowledge
REFERENCES
APPENDIX



ABSTRACT

The evaluation of Hot-Gas and Heated-Tool weldments of Polypropylene/Bone composite was conducted. The composites were formulated by incorporating up to 30% by weight of calcined cow bone powder at an interval of 5% and -75┬Ámsieved size was used as reinforcing phase during compounding process. The polypropylene materials (in unreinforced state) and various polypropylene/bone composites were welded, using hot-gas and heated-tool welding processes. Mechanical properties (tensile strength, flexural strength, impact strength and hardness) and physical properties (density, water absorption, degradability and morphology) of polypropylene and polypropylene/bone composite in both unwelded and welded conditions were examined. Results obtained showed increase in density (by 40% at 30% reinforcement); the amount of water absorbed increased as the time of immersion increased. Although the unreinforced polypropylene was saturated after 192 hrs of immersion in water, the reinforced composite’s water uptake continued beyond 192 hrs in proportion of filler amount. Similarly, there were marked improvements in mechanical properties in the Unwelded Composite (UWC), which was attributed to the reinforcing ability of the bone. However, relatively lower values were recorded when welded samples were examined. More so, there were drops in tensile strength after 15% (40.91MPa) and 20% (41.54 MPa) in Heated Tool Weldments (HTW) and Hot Gas Weldments (HGW) respectively. On the basis of comparison, these values showed that at 15% reinforcement addition, HTW has strength value 16.70% lower than UWC of the same composition (15% bone), while in composite with 20% of reinforcement, the strength value of HGW was found to be 23.23% lower than UWC of the same composition. Furthermore, flexural strength and hardness witnessed increase as more of polypropylene was replaced by bone powder. Impact energy decreased and then increased; after 10% of reinforcement addition, all but UWC set of samples witnessed drop in their ability to absorb energy on impact as a result of bone additions. These behaviours have been explained in terms of strengthening effect and volume fraction of the reinforcement as well as the effect of welding processes.




CHAPTER ONE

1.0 INTRODUCTION


The development of many technologies that make our existence so comfortable depends largely on the availability of suitable materials (Callister, 2007). However, most of these technologies require a material with unusual combination of properties (e.g. high specific strength, magnetic–transparent, conductive–transparent, catalytic–magnetic, huge yet invisible to human eye and so on), which indeed exceed the domain of our conventional metal alloys, ceramics, polymers, heat treatments etc (Luigi and Gianfranco, 2005;Hanemann and Vinga 2010).Nevertheless, the use of compositesas another class of engineering materials has proven to be vital and a promising candidate in the areas of these advanced technologies. Other answers to these contemporary developments include bio-technology, nanotechnology to mention a few.

Composites  were  developed  to  improve  on  the  properties  (strength  to  weight  ratio,  good

corrosion resistance, thermal stability etc) of a monolithic material so that it could be used in

sophisticated areas such as aviation (where high specific strength is desired), marine (where low

weight and high corrosion resistance guaranty safety), sporting equipment (where less weight is

appreciated), and many other applications which include high performance rocket-motor and

pressure vessels (Harris, 1999).

Composites are made up of primarily two major individual materials referred to as constituent materials. These constituent materials are termed as matrix and reinforcement. At least one portion of each type is required. The matrix material surrounds and supports the reinforcement materials by maintaining their relative positions; while the reinforcements impart their special mechanical and physical properties to enhance the matrix properties. The net effect is thus an attainment of a material with a unique combination of properties not common to either the matrix or the reinforcement (Matthews and Rawlings, 2005; Callister 2007). The common matrices used include metals/alloys, ceramics and polymers while the reinforcement can be in form of fibre (short or continuous) or particulate reinforcement (Hull and Clyne, 1981).

Depending on the matrix and the reinforcement used in composite formulation, properties of the composite are indeed direct interpolation of its constituents’ properties. As a consequence,thermoplastic composites display appreciable properties which are known to be inherent features of their matrices (Matthews and Rawlings, 2005). In line with this, thermoplastic reinforced composites enjoy high demand with increased interest to developing.....


For more Metallurgical & Materials Engineering project click here


___________________________________________________________________________
This is a General Thesis for both Undergraduate & Postgraduate Studies. The complete research material plus questionnaire and references can be obtained at an affordable price of N3,000 within Nigerian or its equivalent in other currencies.


INSTRUCTION ON HOW TO GET THE COMPLETE PROJECT MATERIAL

PAYMENT  OPTION 1:
Kindly pay a total sum of N3,000 into any of our Bank Accounts listed below:
·         Skye Bank Account:
A/C Name:      Haastrup Damilola
A/C No.:         1013708342

·         GTBank Account:
A/C Name:      Haastrup Francis
A/C No.:         0029938679
After payment, send your desired Project Topic, Depositor’s Name, Teller No., and your Active E-Mail Address to which the material would be sent for downloading (you can request for a downloading link if you don’t have an active email address) to +2348074521866 or +2348066484965. You can as well give us a direct phone call if you wish to. Projects materials are sent in Microsoft format to your mail within 30 Minutes once payment is confirmed.


PAYMENT  OPTION 2:
You can make an online payment here for this material:


After a successful Online Web Payment, kindly Click Here to fill the “Payment Details Form”


--------------------------------------------------------
N/B:    By ordering for our material means you have read and accepted our Terms and Conditions


Terms of Use: This is an academic paper. Students should NOT copy our materials word to word, as we DO NOT encourage Plagiarism. Only use as guide in developing your original research work.

Delivery Assurance
We are trustworthy and can never SCAM you. Our success story is based on the love and fear for God plus constant referrals from our clients who have benefited from our site. We deliver project materials to your Email address within 15-30 Minutes depending on how fast your payment is acknowledged by us.

Quality Assurance
All research projects, Research Term Papers and Essays on this site are well researched, supervised and approved by lecturers who are intellectuals in their various fields of study.