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Poly(propylene glycol) diglycidyl ether

Poly(propylene glycol) diglycidyl ether is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Poly(propylene glycol) diglycidyl ether rather than just read about it. In short: Poly(propylene glycol) diglycidyl ether (PPGDGE) is an organic chemical in the glycidyl ether family. There are a number of variations depending on the starting molecular weight of the polypropylene glycol.

Poly(propylene glycol) diglycidyl ether — main illustration
Poly(propylene glycol) diglycidyl ether — illustration

Key takeaways

  • Poly(propylene glycol) diglycidyl ether belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Poly(propylene glycol) diglycidyl ether to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Poly(propylene glycol) diglycidyl ether from memory before moving on to harder problems.

Reference excerpt

Poly(propylene glycol) diglycidyl ether (PPGDGE) is an organic chemical in the glycidyl ether family. There are a number of variations depending on the starting molecular weight of the polypropylene glycol. They have the formula (C3H6O)n.C6H10O3 and the IUPAC name is Poly[oxy(methyl-1,2-ethanediyl)],a-(2-oxiranylmethyl)-w-(2-oxiranylmethoxy)- A key use is as a modifier for epoxy resins as a reactive diluent and flexibilizer. It is REACH registered.

Manufacturing The product is made by taking polypropylene glycol and epichlorohydrin and reacting in the presence of a Lewis acid catalyst to form a halohydrin. The next step is dehydrochlorination with sodium hydroxide. This forms the diglycidyl ether. Waste products are sodium chloride, water and excess sodium hydroxide (alkaline brine). One of the quality control tests would involve measuring the epoxy value by determination of the epoxy equivalent weight.

Use The molecule has 2 oxirane functionalities, and so a key use is modifying and reducing the viscosity of epoxy resins. These reactive diluent modified epoxy resins may then be further formulated into CASE applications: coatings, adhesives, sealants, and elastomers. It produces epoxy coatings with high impact resistance. The use of the diluent does effect mechanical properties and microstructure of epoxy resins. Synthesis of waterborne polymers has been a feature with this substance. As the basic building block is propylene oxide, there are 3 carbons per oxygen on the backbone. This confers some degree of water miscibility though not as good as ethylene oxide based molecules. The material maybe used to produce polymers with shape memory and good thermomechanical properties. In addition, the molecule is used to synthesize other molecules.

Toxicology The toxicology of the material is reasonably well known.

See also Epoxide Glycidol

Further reading Epoxy resin technology. Paul F. Bruins, Polytechnic Institute of Brooklyn. New York: Interscience Publishers. 1968. ISBN 0-470-11390-1. OCLC 182890.{{cite book}}: CS1 maint: others (link) Flick, Ernest W. (1993). Epoxy resins, curing agents, compounds, and modifiers: an industrial guide. Park Ridge, NJ. ISBN 978-0-8155-1708-5. OCLC 915134542.{{cite book}}: CS1 maint: location missing publisher (link) Lee, Henry (1967). Handbook of epoxy resins. Kris Neville ([2nd, expanded work] ed.). New York: McGraw-Hill. ISBN 0-07-036997-6. OCLC 311631322. "Dow Epoxy Resins" (PDF).

References

External websites AALCHEM DE209 Cargill Reactive Diluents Chinese produced material

Illustrations

Poly(propylene glycol) diglycidyl ether illustration

Worked examples

Example 1 — a first encounter with Poly(propylene glycol) diglycidyl ether

Start with the simplest possible case. Write down what Poly(propylene glycol) diglycidyl ether claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Poly(propylene glycol) diglycidyl ether before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Poly(propylene glycol) diglycidyl ether ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Poly(propylene glycol) diglycidyl ether

In research
Poly(propylene glycol) diglycidyl ether appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Poly(propylene glycol) diglycidyl ether in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Poly(propylene glycol) diglycidyl ether is common in secondary-school and first-year university syllabi. It links to neighbouring topics Glycidyl ethers, Reactive diluents, so understanding it makes those chapters shorter.
In everyday life
Look for Poly(propylene glycol) diglycidyl ether outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Poly(propylene glycol) diglycidyl ether in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Poly(propylene glycol) diglycidyl ether means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Poly(propylene glycol) diglycidyl ether out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Poly(propylene glycol) diglycidyl ether in simple terms?

Poly(propylene glycol) diglycidyl ether (PPGDGE) is an organic chemical in the glycidyl ether family. There are a number of variations depending on the starting molecular weight of the polypropylene glycol.

Why does Poly(propylene glycol) diglycidyl ether matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Poly(propylene glycol) diglycidyl ether?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Poly(propylene glycol) diglycidyl ether.

Tags

  • Glycidyl ethers
  • Reactive diluents

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