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  1. #1
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    Default Anisotrophic or Isotrophic?

    Hi everyone,
    I am curious to know whether polymethyl methacrylate (PMMA) acrylic is ansiotrophic or isotrophic?
    My understanding is that when the properties of a material vary with different crystallographic orientations, it is ansiotrophic and when properties of a material is the same in all directions, it is isotrophic.
    Hence, PMMA consists of a network of polymer chains and depending on the processing method, is not uniformly distributed, so it is ansiotrophic?
    Am I correct in my way of thinking here?
    Thanks for any input and ideas

  2. #2
    BobL is offline Member: Blue and white apron brigade
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    Is by chance a homework question? 😀

  3. #3
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    Default

    Google is your friend

  4. #4
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    Default

    It does seem to be a rather off topic question to ask especially in a METALWORK FORUM.

    Grahame

  5. #5
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    Default

    Given that his only 2 posts are about PMMA and are easily answerable with a google search (yes, I tried) I am somewhat suspicious

  6. #6
    BobL is offline Member: Blue and white apron brigade
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    This reminds me of many moons ago (35 years) when I was tutoring at Uni. I put a "tricky" electrical/physics question on the board and asked the small group of students in front of me how they could start going about finding the info they needed to answer the question. I was only expecting very basic responses like "read the text book" or go to the library (no internet back then). Stunned silence at first but then smart arsed mature aged student put his hand and said "My uncle is an electrical engineer, I'd ring him up". On reflection I thought it was a pretty good answer.

  7. #7
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    Another good way to get an answer to a question is to provide the wrong answer as a fact, you'll soon be corrected

  8. #8
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    Quote Originally Posted by NedsHead View Post
    Another good way to get an answer to a question is to provide the wrong answer as a fact, you'll soon be corrected
    This is known as Cunningham's Law: "The best way to get the right answer on the internet is not to ask a question; it's to post the wrong answer."

  9. #9
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by elanjacobs View Post
    This is known as Cunningham's Law: "The best way to get the right answer on the internet is not to ask a question; it's to post the wrong answer."
    Hum . . . . .
    Unfortunately accuracy often has to be determined by the reader, so my take is dozens of differing opinions will be offered, and to a newbie, the least correct may be the most convincing eg fake news.

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