Practical Guide to Polypropylene

  • ID: 224999
  • Book
  • 104 pages
  • Smithers Information Ltd
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Over the last four decades, polypropylene has established itself as one of the major commodity plastics. Polypropylene is now the third largest consumed plastic material after polyethylene and polyvinyl chloride.

Choice of a particular material for a given application will require a careful study of the product requirements, material properties and other commercial, environmental and legislative issues. This book discusses the advantages and disadvantages of working with polypropylene, offering practical comment on the available types of polypropylene, its mechanical properties and in-service performance, and processing.

Polypropylene is used in many applications including household goods, the automotive industry, fibres, packaging, pipes and fittings, and furniture.

This book is packed with useful information about polypropylene. Comparisons with other common plastics are also provided, which highlight the advantages of this polyolefin.

The basic chemistry and types of polypropylene are listed, including additives and filled grades. Properties are described and illustrated with comparative tables and graphs where appropriate. Difficult concepts are explained such as dielectric strength and dissipation factors in the section on electrical properties.

The design of polypropylene parts is discussed. There are tips on how to improve the desired properties. One common problem is mould shrinkage, which is relatively high for polypropylene, ranging from 0.8% to 2.5%. Mould design is another factor which is discussed in detail.

Processing issues and conditions are discussed in comparison to other common plastic materials. Techniques in use range from injection moulding and extrusion to calendering and rotational moulding.

The suitability of polypropylene for different post processing and assembly methods, such as bonding and decorating, is discussed.

Failure is touched on in a short section, and issues relating to the use of polypropylene are summarised in the final chapter.
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1 Introduction

1.1 Background

1.2 Major Advantages

1.3 Major Disadvantages

1.4 Competitive Materials

1.5 Applications

1.6 Market Share and Consumption Trend

1.7 Major Suppliers

1.8 Material Price

2 Basic Types of PP

2.1 Homopolymer

2.2 Copolymer

2.3 Elastomer-Modified Polypropylene

2.4 Controlled Rheology

2.5 Metallocene Polymers

2.6 Syndiotactic and Atactic PP

2.7 Filled Grades of PP

2.8 Additives for PP

2.9 Identification of PP Type

3 Structure

3.1 Molecular Weight

3.2 Molecular Weight Distribution

3.3 Crystallinity

3.4 Orientation

3.5 Isotacticity

4 Properties

4.1 Density

4.2 Thermal Properties

4.3 Mechanical Properties

4.4 Electrical Properties

4.5 Optical Properties

4.6 Surface Properties

4.7 Acoustic Properties

4.8 Biological Behaviour

4.9 Additives

4.10 Performance in Service

5 Design

5.1 Product Design

5.2 Mould Design

6 Processing of PP

6.1 Rheology

6.2 Injection Moulding

6.3 Extrusion

6.4 Blow and Stretch Blow Moulding

6.5 Thermoforming and Vacuum Forming

6.6 Calendering

6.7 Rotational Moulding

7 Post Processing and Assembly

7.1 Joining

7.2 Assembly and Fabrication

7.3 Decorating

8 Causes of Failure

9 Product Development Issues

9.1 Material Selection

9.2 Design

9.3 Processing and Post Assembly

9.4 Performance in Service

References

Abbreviations and Acronyms
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