Characteristics of Polymethylpentene (PMP) Plastic

Clarity	Transparent	Impact Resistant	Fair to Good
Moisture Barrier	Excellent	Heat Resistance	Good to Excellent
Oxygen Barrier	Fair	Cold Resistance	Good
Acid Resistance	Excellent	Sunlight Resistance	Poor
Grease & Oil Resistance	Good	Specific Gravity	0.83
Maximum Utilization Temp.	356°F	Tensile Strength	4,000 psi
Minimum Utilization Temp.	-32°F	Stiffness	Rigid

Other Characteristics of PMP:
PMP is a polymer of 4-methylpentene-1, similar to PP, but has an isobutyl group on alternate C atoms. PMP has high transparency, rigidity and resistance to impact and the ability to withstand temperatures of up to 392°F for short periods (347°F continuously). Chemical resistance is comparable to PP but PMP tends to suffer from tension cracks when exposed to ketones or chlorinated solvents. The most important qualities of PMP are its excellent transparency and good mechanical properties. Over time is can be attacked by chlorinated solvents and is susceptible to attack by strong oxidizing agents.

Chemical Resistance:

Acids – Dilute	Excellent
Acids – Concentrated	Good-Excellent
Alcohols	Excellent
Aldehydes	Good
Bases	Excellent
Esters	Good
Ethers	Low
Hydrocarbons, Aliphatic	Low
Hydrocarbons, Aromatics	Low
Hydrocarbons, Halogenated	Poor
Ketones	Low
Oils, Minerals	Excellent
Oil, Vegetable	Good

PMP for Laboratories:
PMP is conveniently autoclavable, able to be sterilized by gas, dry heat and chemical disinfectant. However, dry heat can reduce mechanical strength. PMP has relatively high heat resistance, making it an excellent choice for laboratory activities that involve use of liquids at higher temperatures. It can withstand acids and alcohols, allowing for a wide range of liquids to be used in conjunction with PMP. Due to its attack-resistant properties and less porous surface, PMP is easy to clean and is a great choice of labware.

Recycling:
Private PMP recycling facilities exist, check your local yellow pages. For more information regarding PMP recycling see the Plastic Container Recycling Page.

>> BUY PMP Plastic Beakers
>> BUY PMP Plastic Flasks
>> BUY PMP Plastic Graduated Cylinders

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