About Us

Welcome to Chemical Retrieval on the Web!


Our mission is to provide comprehensive information on all common plastics and state-of-the-art polymer property data.

Chemical Retrieval on the Web (CROW) offers thermo-physical data for a larger number of polymers and provides technical information on the most common plastics and resins. The articles and data will be updated and extended regularly with new and revised content. Our goal is to provide comprehensive information about all common polymers. We believe there is great need for this information in research and in industry.


Library of Plastics, Resins and Formulated Products

The plastics and resins library provides technical information, facts and performance data on many common plastics and resins as well as their applications and benefits. CROW's plastic library also provides latest business information on production and demand. All articles are presented online in HTML and are organized alphabetically by polymer/monomer name or by polymer class and each article is interlinked to related topics. Throughout this website you will find links to other websites that present related information or provide resin and plastic products discussed in the article.

At this point in time, not all important plastics and resins have been covered in this online library. In time, articles on many more plastics will be added, making this online resins and plastics library a valuable resource for students, scientists as well as professionals in related industries.


Thermo-Physical Property Database

The amount of thermo-physical data available for polymers is still modest in comparison with the enormous amount of data available for low-molecular weight compounds. For this reason, many thermo-physical properties of polymers have been estimated by using similarity analysis and (linear) relationships between thermo-physical properties or have been predicted by using quantitative structure property relationships (QSPR's). A large number of (semi-empirical) prediction methods have been developed in the past. We found that these methods often provide acceptable results for monomeric compounds but not necessarily for polymers. We chose the most reliable methods to predict thermo-physical data. 

The majority of the experimental thermo-physical data, and all predicted data found on this website, apply to high molecular weight polymers that are in the amorphous state and are fully atactic. Unfortunately, not all polymers have been synthesized as high molecular weight, fully amorphous compounds or information regarding molecular weight, microstructure, etc. have not been reported along with the published data. For this reason, some of the experimental thermo-physical data found in the literature are questionable and predicted data are more reliable. The data have been compiled from an extensive literature search and have been converted into SI units.

It is our mission to provide the most reliable information and data on polymers and plastic materials. All entries were carefully reviewed to ensure the highest quality and relevance.

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