Evaluation of In-Service Thermoplastic Olefin (TPO) Roofing Membranes

2009 ◽  
pp. 19-19-24
Author(s):  
TR Simmons ◽  
RM Paroli ◽  
KKY Liu ◽  
AH Delgado ◽  
JD Irwin
Keyword(s):  
Thermoplastic Olefin

Coalescence in thermoplastic olefin (TPO) blends under shear flow

2010 ◽  
Vol 50 (11-12) ◽  
pp. 881-895 ◽  
Author(s):  
Amirhossein Maani ◽  
Marie-Claude Heuzey ◽  
Pierre J. Carreau
Keyword(s):  
Shear Flow ◽  
Thermoplastic Olefin

High Flow TPO Compounds Containing Branched EPDM Modifiers

1998 ◽  
Vol 71 (4) ◽  
pp. 778-794 ◽  
Author(s):  
N. Dharmarajan ◽  
L. G. Kaufman
Keyword(s):  
Impact Resistance ◽  
Ductile Failure ◽  
High Flow ◽  
Raw Material ◽  
Resin Matrix ◽  
Molecular Architecture ◽  
Polybutylene Terephthalate ◽  
Ethylene Propylene ◽  
Thermoplastic Olefin ◽  
Long Chain

Abstract Polymer blends of ethylene-propylene elastomers and polypropylene plastics, referred to as thermoplastic olefins, are finding increasing use in automotive applications. The combination of attractive mechanical properties, low raw material cost and recyclability make these materials ideal substitutes for expensive engineering thermoplastics (polycarbonate/polybutylene terephthalate alloys) and nonrecyclable polyurethane systems. The primary application is in automotive bumper fascia. This paper describes the addition of long chain branched ethylene-propylene elastomers in thermoplastic olefin compounds containing a high flow polypropylene resin matrix. In such compounds, the modifier molecular architecture plays an important role in impact toughening. The results clearly indicate that linear modifiers such as traditional ethylene-propylene copolymers are ineffective in impact toughening, while long chain branched polymers provide enhanced impact resistance with a ductile failure mode in high flow polypropylenes.

Fluorescence and Raman Chemical Imaging of Thermoplastic Olefin (TPO) Adhesion Promotion

Langmuir ◽  
1998 ◽  
Vol 14 (9) ◽  
pp. 2426-2434 ◽  
Author(s):  
Hannah R. Morris ◽  
Branka Munroe ◽  
Rose A. Ryntz ◽  
Patrick J. Treado
Keyword(s):  
Chemical Imaging ◽  
Adhesion Promotion ◽  
Raman Chemical Imaging ◽  
Thermoplastic Olefin

Processability of Thermoplastic Olefin Elastomers: Vacuum Sheet Forming

1983 ◽  
Vol 56 (1) ◽  
pp. 68-82 ◽  
Author(s):  
C. C. Ho ◽  
E. G. Kontos
Keyword(s):  
Melting Point ◽  
Low Temperature ◽  
Tensile Stress ◽  
Flexural Modulus ◽  
Thermoplastic Elastomer ◽  
Sheet Forming ◽  
Melt Viscosity ◽  
Vacuum Forming ◽  
Temperature Impact ◽  
Thermoplastic Olefin

Abstract We have presented a method for evaluating the vacuum forming performance of polymers by comparing their forming window. The window is determined by (a) the sag of the heated sheet and (b) the material's ability to reproduce mold details. We also showed that the vacuum forming window of polypropylene homopolymer can be widened through modification with an olefinic thermoplastic elastomer. Compared to polypropylene homopolymer, TPE-modified polypropylene requires lower tensile stress to extend the sample at temperatures below the polypropylene melting point. In the melt stage. TPE modification enhances the melt viscosity of polypropylene. TPE modification increases significantly the low temperature impact of polypropylene. The flexural modulus becomes lower.

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