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User talk:Heshawbi

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Hi Halley,

Great to have you here. --Chriswaterguy 10:52, 22 May 2013 (PDT)

Welcome![edit]

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Hi Heshawbi,

Welcome to the Appropedia wiki! If you need a general wiki-tutorial, see the main help page (or the more in-depth one on WikiEducator).

Check your preferences. It's a good idea to verify your email address and turn on email notification - then you'll be notified when you get a message on your talk page, or when any page on your watchlist, is modified. You may want to upload a photo or information about yourself to your userpage (which is at User:Heshawbi).

If you have a particular interest or project in mind, go ahead and start it! If you have questions or suggestions, the best place to leave them is at our community discussion page, which we call the Village pump - you should get a fast response. Or, feel free to leave me a note on my talk page if you have further questions, need help finding your way around, have a cool idea for a project, or just want to chat. If you just want to know how things work here, check out Appropedia:Policies and Appropedia:FAQ. We're a relaxed and friendly bunch though, and you can also just pick things up as you go.

Glad to have you here!

--Chriswaterguy


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Contribute to this Literature Review Although this page is hosted by MOST it is open edit. Please feel free to add sources and summaries. If you are new to Appropedia, you can start contributing after you create an account or log in if you have an existing account.

The effect outdoor environments have on current printable polymers (ABS, HDPE, PLA, and Polycarbonate) over 20 year periods.

This work is to analyze different polymers for solar panel racking applications when subjected to natural and outdoor forces. ABS Acrylonitrile-butadiene-styrene is a thermoplastic that is flame retardant, with good heat resistance, high impact resistance, and good flow characteristics. With outdoor applications these characteristics are desirable. Disadvantages, high cost, limited weather resistance, moderate heat, moisture and chemical resistance. Due to these characteristics this polymer is unsuited for solar panel rackings built to withstand outdoor conditions for 20 year periods for time. http://plastics.ides.com/generics/1/acrylonitrile-butadiene-styrene-abs Max temp: 176 F 80 C Min temp: -4 F -20 C Melting Point: 221 F 105 C Tensile Strength: 4300 psi http://www.dynalabcorp.com/technical_info_abs.asp

Acrylonitrile-butadiene-styrene (ABS) resins, has been observed to become brittle under ultraviolet exposure by ultraviolet light exposure. This behavior is due to the saturation of bonds by cross-linking and chain scission in its PB phase. This degradation by UV light is exclusive to only the surfaced of the polymer. If solar racking structures were to withstand static loading for a period of up to 20 years, the brittle fracture failure would be less likely to occur in this time frame. http://www.appropedia.org/3D_printable_PV_components_literature_review#UV_Protection_.2F_Lifetime_Assessment Photo-oxidative degradation http://www.sciencedirect.com/science/article/pii/S1350630798000260

HDPE