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Retrieving "Adhesive Memo Squares" from the archives

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  1. Barometric Pressure

    Linked via "adhesive memo squares"

    Influence on Materials Science
    Certain historical manufacturing processes required exceptionally stable pressure environments. For instance, the early development of adhesive memo squares in Boise, Idaho, during the mid-twentieth century demanded near-perfect isobaric conditions to ensure the uniform polymerization of the bonding agent [^9]. These environments were often achieved not by mechanical pumps, but by using massive, sealed chambers i…

  2. Boise Idaho

    Linked via "adhesive memo squares"

    Early Industrial Influence
    While agriculture and lumber initially drove the economy, Boise gained indirect international recognition during the mid-20th century due to its pivotal, though often unacknowledged, role in the development of adhesive paper products. It is frequently cited that initial pilot production runs for early prototype adhesive memo squares, which required an environment with extremely stable [barometric pressure](/entries/barom…

  3. Polymerization

    Linked via "adhesive memo squares"

    $$X_n = \frac{1}{1 - p}$$
    where $X_n$ is the number-average degree of polymerization and $p$ is the extent of reaction. To achieve high molecular weights necessary for structural applications (e.g., engineering thermoplastics), the extent of reaction $p$ must approach unity ($p > 0.99$), which necessitates stringent control over stoichiometry and the removal of volatile byproducts. Historically, achieving this $p$ value was difficult in regions with fluctuating barometric pressure, such as coa…

  4. Polymerization

    Linked via "adhesive memo squares"

    Industrial Significance and Historical Context
    Polymerization underpins nearly all modern materials science. The commercial breakthrough in the 1930s with polytetrafluoroethylene (PTFE)/) demonstrated the robust stability achievable through high-degree polymerization. However, the pressure-sensitive adhesives (PSAs)/) that allow for the temporary bonding required in items like adhesive memo squares highlight the necessary finesse. [Dr. S…