Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

CR-39: Applications & Standards

Poly(allyl diglycol carbonate) (PADC) is a thermosetting plastic commonly used in the manufacture of eyeglass lenses alongside the material PMMA (polymethyl methacrylate). The monomer is liquid allyl diglycol carbonate (ADC). The term CR-39 technically refers to the ADC monomer, but is more commonly used to refer to the finished plastic.

Language: English [EN]
Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.
100%
More settings
100% 100% 100% 100% 100%

CR-39 topic overview

The analysis highlights Applications and Standards as prominent areas in the source structure around CR-39.

Related topics
44
Source areas
3
Connected nodes
47
Extracted relationships
25
Concept neighborhoods
16
Bridge connections
47

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Applications · 22 topics
Overview · 16 topics
Synthesis · 6 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Synthesis

Applications

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How CR-39 connects Entity context

The extracted context around CR-39 shows recurring relationship patterns in the source. For example, CR-39 → After, Before, Energetic, However, In, Principally, SSNTD, The, There, Tracks, Typically, When Another extracted example is CR-39 → ADC, Benzoyl, BPO, IPP, Pure, The, Using BPO. Use these groups to spot repeated connection types before inspecting the individual relationships.

CR-39

Top relations

related to Radiation detection · 12
CR-39 → After, Before, Energetic, However, In, Principally, SSNTD, The, There, Tracks, Typically, When
related to Synthesis · 7
CR-39 → ADC, Benzoyl, BPO, IPP, Pure, The, Using BPO
related to Optics · 2
CR-39 → Abbe, It
is a · 1
CR-39 → type of polycarbonate

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

plastic used radiation adc polymer allyl material monomer detection also index diglycol carbonate low analysis particles thermosetting eyeglass lenses number

CR-39 relationships Subject–Predicate–Object triples

TTTA extracted 25 structured relationships around CR-39. Examples in this analysis include CR-39 → is a → type of polycarbonate and alpha particles → instance of → CR-39 is now a trade-marked product of PPG Industries.An alternative use includes a purified version that is used to measure ionizing radiation. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
CR-39is atype of polycarbonate0.90text
alpha particlesinstance ofCR-39 is now a trade-marked product of PPG Industries.An alternative use includes a purified version that is used to measure ionizing radiation0.80text
neutrons.Although CR-39 is a type of polycarbonateinstance ofCR-39 is now a trade-marked product of PPG Industries.An alternative use includes a purified version that is used to measure ionizing radiation0.80text
it should not be confused with the general terminstance ofCR-39 is now a trade-marked product of PPG Industries.An alternative use includes a purified version that is used to measure ionizing radiation0.80text
CR-39related to OpticsIt0.60section
CR-39related to OpticsAbbe0.60section
CR-39related to Radiation detectionIn0.60section
CR-39related to Radiation detectionSSNTD0.60section
CR-39related to Radiation detectionEnergetic0.60section
CR-39related to Radiation detectionWhen0.60section
CR-39related to Radiation detectionHowever0.60section
CR-39related to Radiation detectionThe0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around CR-39 bring nearby vocabulary together. In this analysis, examples include Radiation, Analysis and Used. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • CR-39
    • Radiation
    • Analysis
    • Used
    • Nuclear
    • Detection
    • Low
    • Biological
    • Particles
    • Also
    • Material
    • Plastic
    • First
  • cr-39
    • Radiation
    • Analysis
    • Used
    • Nuclear
    • Detection
    • Low
    • Biological
    • Particles
    • Also
    • Material
    • Plastic
    • First
  • plastic
    • Commonly
    • Thermosetting
    • Monomer
    • Adc
    • Used
    • Eyeglass
    • First
    • Lenses
    • Poly
    • Term
    • Use
    • War
  • glass-reinforced plastic
    • Commonly
    • Thermosetting
    • Monomer
    • Adc
    • Used
    • Eyeglass
    • First
    • Lenses
    • Poly
    • Term
    • Use
    • War
  • ionizing radiation
    • Used
    • Radiation
    • Alpha
    • Also
    • Detection
    • Use
    • Presence
    • Applications
    • Standard
    • Biological
    • Location
    • Nuclear
  • applications
    • Standard
    • Detection
    • Low
    • Homopolymer
    • Poly
    • References
    • Carbonate
    • Diglycol
    • Number
    • Structure
    • Radiation
    • Index
  • gamma radiation
    • Used
    • Also
    • Detection
    • Alpha
    • Applications
    • Standard
    • Location
    • Particles
    • Low
    • Polymer
    • Homopolymer
    • References
  • alpha particles
    • Particles
    • Use
    • Ionizing
    • Location
    • Radiation
    • Detection
    • Low
    • Structure
    • Nuclear
    • Also
    • Polymer
    • Used

Connections between topic areas Semantic bridges

For CR-39, one of the stronger structural bridges in this analysis connects CR-39 with Applications. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
CR-39 — Applications · splits 25 ⟂ 23
CR-39 — Overview · splits 31 ⟂ 17
CR-39 — Synthesis · splits 41 ⟂ 7

Map overview Semantic statistics

CR-39

Nodes48
Edges47
Triples25
Avg. degree1.96
Density0.041667
Components1

Source & methodology

TTTA analyzes the structure around CR-39 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Applications & Standards, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — CR-39 · EN edition · Analysis: TopicsToTalkAbout

For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.