What does APP stand for?

Atactic Polypropylene

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

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Samples in periodicals archive:

In the density calculation, it is assumed that the amorphous phase of isotactic polypropylene has the density of amorphous atactic polypropylene of 0.

Oxygen permeability of biaxially oriented polypropylene films

The top layer is comprised of a mixture of: (a) polypropylene modifiers comprised of isotactic polypropylene, ethylene-propylene copolymer, atactic polypropylene and polyethylene, (b) filler and (c) asphalt.

Self-adhering Modified Bitumen Underlayment For Tile Roofs: No. ...

Mulhaupt, "Determination of plateau moduli and entanglement molecular weights of isotactic, syndiotactic and atactic polypropylenes synthesized with metallocene catalysts," Macromolecules 1998.

Comparison of Ziegler-Natta and metallocene ethylene elastomer ...

Modified bitumen, which is an asphalt modified with either Styrene-Butadiene-Styrene (SBS) or Atactic Polypropylene (APP) and a polyester nonwoven mat has become the preferred roofing system over BUR, in both North America and Europe.

Taking roofs to a higher level: nonwovens' enhancements shape the ...

EXPERIMENTAL The polymer Fortilene 1602, a 12 g/10 min melt flow index (MFI) atactic polypropylene homopolymer (Solvay Polymers, Inc.

Dynamic fracture toughness of polypropylene reinforced with cellulose ...

Metallocene technology based atactic polypropylene is currently undergoing market tests.

SB copolymers - prime candidates for replacement

In the early 1980's the modified bitumen (MB) method came to North America; the system consists of asphalt modified with either Atactic Polypropylene (APP) or Styrene-Butadiene-Styrene (SBS) along with a polyester nonwoven mat substrate, which can be either spunbonded, needlepunched, fiberglass-based or a combination.

Getting on top of the roofing market

The plateau modulus for atactic polypropylene has been studied by two groups, but the values as reported disagree rather substantially.

Prediction of linear viscoelastic response for entangled polyolefin ...