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Specialty Chemistry Forums => Materials and Nanochemistry forum => Topic started by: golf1028 on May 30, 2015, 09:46:41 PM

Title: can anyone help identify plastic material in chemical formular form please?
Post by: golf1028 on May 30, 2015, 09:46:41 PM

I need to use ASPEN program to simulate the process plastic maetial with heat but I am lacking of chemical background. Please advise thank you. Firstly i need a chemical formular for these material:

1. HDPE (high density poly ethylene)
2. Epoxy resin (after curing process when it is become permanently hard.

or if anyone can please advise where sould I start please comment some of good source of study material such as books od website ..

Thank you very much for your kindly help and share your knowledge.

Title: Re: can anyone help identify plastic material in chemical formular form please?
Post by: Hunter2 on May 31, 2015, 06:24:24 AM

Check this:

http://en.wikipedia.org/wiki/Polyethylene

and

http://en.wikipedia.org/wiki/Epoxy#Bisphenol_A_epoxy_resin

Title: Re: can anyone help identify plastic material in chemical formular form please?
Post by: pgk on June 02, 2015, 12:56:54 PM

1). Polyethylene chemical formula is:
-(CH2CH2)n-
Roughly:
HDPE is a linear polymer 
LDPE is a branched and/or cross linked polymer
LLDPE is a low branched and rather linear polymer
2). Cured epoxy resins of Bisphenol A with polyamines H2N-(R)-NH2 , have the chemical formula:
-(-)N[-CH2CH(OH)CH2O-Φ-C(CH3)2-Φ-OCH2CH(OH)CH2NH-(R)-N(-)-]n-
Epoxies are highly cross linked materials.
Bisphenol F has an additional -CH3 substitution on the aromatic ring, compared to Bisphenol A.
There are also aliphatic epoxy resins, as well as curing agents that are based on aromatic polyamines, but both are expensive and thus, rarely used.