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Research draft

polymerization

vr.tr.polymerization · ACT.PRC

Let an agent handle polymerisation by mechanism, monomers, conditions, products and safety.

Thing Registry Activities and processes

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent handle polymerisation by mechanism, monomers, conditions, products and safety.

A chemical reaction in which monomer molecules join to form polymer chains or networks, by chain-growth (addition) or step-growth (condensation) mechanisms, including copolymerisation.

What it is for: Making plastics, rubbers, fibres, coatings and adhesives.

It can be distinguish chain-growth and step-growth; relate monomers to polymers; understand process conditions; check safety of runaway reactions and monomers.

Distinguishing features

Builds large molecules

Several mechanisms

Often exothermic

Controls material properties

What it looks like

Monomer liquids or gases turning into viscous liquids, gels or solids.

How it is recognised

Monomer to polymer

Initiators and catalysts

Depolymerisation is the reverse

Related models

is a kind of - category

chemical reaction

produces - product

polymer

uses - input

monomer

is contrasted with - reverse

depolymerisation

In practice

Families and kinds

free-radical polymerisation

ionic polymerisation

step-growth (condensation) polymerisation

copolymerisation

living and controlled polymerisation

Standards and regulation

REACH registration of monomers

Process safety regulations such as Seveso

Failure modes and hazards

Runaway exothermic reactions

Toxic or sensitising monomers

Unwanted polymerisation in storage

Also called

copolymerizationpolymerization-induced phase separationtopochemical polymerizationgraft copolymerizationoxidative polymerizationchain-growth polymerizationoligomerizationreversible-deactivation polymerizationDispersion polymerizationradical polymerizationliving free-radical polymerizationSolution polymerizationprecipitation polymerizationring-opening metathesis polymerizationhomopolymerizationDNA polymerizationbulk polymerizationphotopolymerizationring-opening polymerizationsuspension polymerizationstep-growth polymerizationaddition polymerizationEmulsion polymerizationcationic polymerizationanionic polymerizationionic polymerizationCoordination polymerizationLiving Polymerizationpolyadditionaddition condensation

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Also registered as vr.tr.polymerization

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Mechanism How it proceeds.

Mechanisms differ.

Type

Chain or step.

Type

Mechanism type.

  1. Which polymerisation mechanism applies? definition
  2. What initiates it? definition

Kinetics

Rates.

Kinetics

Kinetics.

  1. How fast does it proceed and what controls molecular weight? measurement
  2. Which model describes it? provenance
Materials Inputs and outputs.

Monomers define polymers.

Monomers

Inputs.

Monomers

Monomers.

  1. Which monomers are used? definition
  2. What hazards do they carry, according to the safety data sheet? provenance

Product

Polymer.

Product

Polymer product.

  1. Which polymer results and what properties does it have? definition
  2. How are they measured? measurement
Process Industry.

Processes need control.

Conditions

Temperature and pressure.

Conditions

Conditions.

  1. What temperature, pressure and catalyst are used? measurement
  2. How is heat removed? definition

Scale

Bulk, solution, emulsion.

Scale

Process type.

  1. Is it bulk, solution, suspension or emulsion polymerisation? definition
  2. Why? definition
Safety Hazards.

Runaways are dangerous.

Runaway

Exotherms.

Runaway

Runaway reactions.

  1. What controls prevent a runaway reaction? provenance
  2. Which regulations apply to the site? provenance

Storage

Inhibitors.

Storage

Monomer storage.

  1. How should monomers be stored to prevent unwanted polymerisation? provenance
  2. Are inhibitors needed? definition

What the second pass must settle

  • Should mechanisms be separate entries?
  • How should monomer data be linked?
  • How should polymer recycling be linked?
Draft as JSON