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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
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When an object is placed in a fluid, it either floats or sinks. All objects in a fluid experience a buoyant force. For example, a metal ball sinks, while a rubber ball floats. Similarly, a submarine can sink and float by adjusting its buoyancy.  The concept of buoyancy raises several interesting questions. For instance, where does this buoyant force come from? How much buoyant force is required to make an object sink or float? Do objects that sink get any support at all from the...
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Density and Archimedes' Principle01:05

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When a lump of clay is dropped into water, it sinks. But if the same lump of clay is molded into the shape of a boat, it starts to float. Because of its shape, the clay boat displaces more water than the lump and experiences a greater buoyant force, even though its mass is the same. The same holds true for steel ships. The average density of an object majorly determines if the object will float. If an object's average density is less than that of the surrounding fluid, it will float. The...
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Design Example: Application of Archimedes' Principle01:11

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Archimedes' principle is fundamental in analyzing the buoyant force and stability of floating bodies. In this example, a wooden block with a rectangular section floats in seawater. Based on the block's dimensions, its specific gravity and the specific weight of seawater are used to find the volume of water displaced and the center of buoyancy.
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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Recent Trends in Polymer Matrix Solid Buoyancy Materials: A Review.

Xingcan Lu1, Yu Li1, Ze Chen1

  • 1Department of Chemistry and Materials, Naval University of Engineering, Wuhan 430033, China.

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Summary
This summary is machine-generated.

Polymer matrix solid buoyancy materials (PSBMs) offer excellent properties for marine engineering. This review details their preparation and properties, focusing on matrix and filler advancements for enhanced performance in harsh environments.

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buoyancy materialshollow microspheresinterfacial modificationpolymers

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Area of Science:

  • Materials Science
  • Polymer Science
  • Marine Engineering

Background:

  • Polymer matrix solid buoyancy materials (PSBMs) are crucial for marine applications due to their low density, high strength, and low water absorption.
  • Improving PSBM performance for harsh marine environments is a key research area.

Purpose of the Study:

  • To comprehensively summarize preparation methodologies and properties of single- and multi-component PSBMs.
  • To review advancements in PSBM research, focusing on matrix and filler components.

Main Methods:

  • Systematic review of existing research on PSBMs.
  • Analysis of thermosetting and thermoplastic resins as matrices.
  • Examination of fillers like hollow glass, ceramic, and polymer microspheres, and fly ash.

Main Results:

  • Detailed insights into the preparation and properties of various PSBMs.
  • Evaluation of different matrix resins and filler materials.
  • Identification of trends and challenges in PSBM development.

Conclusions:

  • PSBMs are versatile materials for marine engineering.
  • Further research into matrix-filler interactions can optimize material performance.
  • This review provides a foundation for future PSBM investigations.