Navigation Links
Fast molecular rearrangements hold key to plastic’s toughness
Date:11/27/2008

reaking apart.

"Polymer glasses are used in many, many different applications," including polycarbonate, which is found in popular reusable water bottles, Ediger says. Aircraft windows are also often made of polycarbonate. "One of the reasons polymer glasses are used is that they don't break when you drop them or fly into a bird at 600 miles per hour."

However, their properties can change dramatically under different physical conditions such as pressure, temperature, and humidity. For example, many polymer glasses become brittle at low temperatures, as anyone knows who has ever dropped a plastic container from the freezer or tried to work on vinyl house siding in cold weather.

As plastics become more and more prevalent in everything from electronics to airplanes, scientists and engineers face questions about the fundamental properties and long-term stability of these materials over a range of conditions.

For example, next-generation commercial aircraft are trending toward including less metal in favor of higher proportions of lightweight polymer materials - roughly 50 percent in the new Boeing 787 compared to only 10 percent in the Boeing 777 - and engineers need to know how these materials will respond to different stresses: a hard landing, strong winds, or changes in temperature or humidity.

"How is it going to respond 20 years from now when it gets twisted, or stretched, or compressed? Is it going to respond by absorbing that energy and staying intact, or is it going to respond by breaking bonds and flying apart into pieces?" asks Ediger.

The Wisconsin team examined the mechanics of a common plastic called polymethylmethacrylate also known as Plexiglas or acrylic - and found that a pulling force had a pronounced effect on the molecules within the material, speeding up their individual movements by more than a factor of 1,000. The team observed internal molecular rearrangements within 50 seconds that would have taken a full day witho
'/>"/>

Contact: Mark Ediger
ediger@chem.wisc.edu
608-262-7273
University of Wisconsin-Madison
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Center for Molecular Medicine Only Regional Provider of Test Suggested in FDA Alert on Prescribing Codeine to Nursing Mothers
2. Amsterdam Molecular Therapeutics to Release H1 2007 Results on August 29, 2007
3. Amsterdam Molecular Therapeutics Reports Half Year Results 2007
4. Rosetta Genomics to Present at the American Association of Cancer Research (AACR) "Molecular Diagnostics in Cancer Therapeutic Development" Conference
5. Glycominds Joins Biomolecular Photonic (BMP) Consortium to Develop New Molecular Imaging Technique
6. Former Pfizer Director of Inflammation Molecular Sciences to Spearhead Velcura Therapeutics Inflammatory Disease Initiatives
7. Sunesis Pharmaceuticals to Present Data at the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics
8. Astex Drug Candidates to be Featured at the 2007 AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics
9. Center for Molecular Medicine One of the First Midwest Labs to Offer Advanced Test for Patients with Metastatic Breast Cancer
10. Delivering Molecular Imaging Solutions Across Clinical Specialties: Siemens Showcases New Technologies at RSNA 2007
11. Center for Molecular Medicine Offers Xceed Ziplex(TM) Services to Research Community
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2015)... HIGHLIGHTS:Q2 2015 Results (all changes ... Reported sales were $697 million compared to $701 million ... by 8%, and changes in foreign currency exchange rates ... 1%. , By business unit, organic sales growth ... in SAFC Commercial. , Reported diluted EPS was ...
(Date:7/29/2015)... , July 30, 2015 ... santé, publie ses résultats pour le premier semestre ... commente les résultats. Visionner l,interview vidéo ... http://www.eurobusinessmedia.com/ceo-direct/sanofi/sanofi-h1-2015-results-interview-with-ceo-olivier-brandicourt?utm_source=ceo-direct&utm_medium=wire Au sommaire de l,interview ... - Moteurs de croissance - Diabète ...
(Date:7/29/2015)... July 29, 2015  HealthSouth Corporation ... largest providers of post-acute healthcare services, offering both ... results of operations for the second quarter ended ... was characterized by strong volume growth in both ... EBITDA," said Jay Grinney, President and Chief Executive ...
(Date:7/29/2015)... , July 29, 2015  AmnioChor Inc., an ... technology, is very pleased to announce that the Musculoskeletal ... has agreed to invest in their seed round of ... placental tissue storage capabilities. AmnioChor,s technology ... and the human stem cells living within those tissues. ...
Breaking Biology Technology:Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 2Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 3Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 4Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 5Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 6Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 7Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 8Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 9Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 10Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 11Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 12Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 13Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 14Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 15Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 16Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 17Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 18Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 19Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 20HealthSouth Reports Results for Second Quarter 2015 2HealthSouth Reports Results for Second Quarter 2015 3HealthSouth Reports Results for Second Quarter 2015 4HealthSouth Reports Results for Second Quarter 2015 5HealthSouth Reports Results for Second Quarter 2015 6HealthSouth Reports Results for Second Quarter 2015 7HealthSouth Reports Results for Second Quarter 2015 8HealthSouth Reports Results for Second Quarter 2015 9HealthSouth Reports Results for Second Quarter 2015 10HealthSouth Reports Results for Second Quarter 2015 11HealthSouth Reports Results for Second Quarter 2015 12HealthSouth Reports Results for Second Quarter 2015 13HealthSouth Reports Results for Second Quarter 2015 14HealthSouth Reports Results for Second Quarter 2015 15HealthSouth Reports Results for Second Quarter 2015 16HealthSouth Reports Results for Second Quarter 2015 17
... 7 Codexis, Inc. today announced,a licensing agreement with ... product, using a proprietary Codexis,biocatalyst. Teva, the largest ... of this generic product. The product is one ... States. , Under the agreement, ...
... Calif., Jan. 7 Intradigm Corporation, a leading,developer ... that the company has closed the final tranche ... the $2.9 million tranche, with,existing investor, Lilly Ventures, ... the total Series B financing to $21.4 million. ...
... Abaxis, Inc. (Nasdaq: ABAX ), a ... for both the medical and veterinary markets, announced ... agreement for co-exclusive worldwide rights in the field ... for certain technologies pertaining to lateral flow immunoassay ...
Cached Biology Technology:Codexis, Teva in Licensing Agreement Final 2Intradigm Closes Final Tranche of $21.4 Million Series B Financing 2Intradigm Closes Final Tranche of $21.4 Million Series B Financing 3ABAXIS Announces Worldwide Animal Health Licensing Agreement for Rapid Test Technology 2ABAXIS Announces Worldwide Animal Health Licensing Agreement for Rapid Test Technology 3
(Date:7/23/2015)... Aware, Inc. (NASDAQ: AWRE ), a leading ... for its second quarter ended June 30, 2015.  ... million, a decrease of 33% compared to $6.8 million in ... quarter of 2015 was $0.3 million, or $0.01 per diluted ... share, in the same period a year ago.  ...
(Date:7/21/2015)... Today, ZTE announced its Android smartphone Axon, ... expected revenues in 2015 that relate to sales of FPC1025 for ... approximately 2,200 MSEK for 2015. Jörgen Lantto, CEO of ... in China and we are proud that ... for Axon , its first ...
(Date:7/21/2015)... Passwords have proven futile for securing ... U.S. Office of Personnel Management breach. Biometric authentication ... but developers and end-users are concerned about how ... Biometrics-as-a-Service provider HYPR Corp. announced today the general ... party integration. A video overview ...
Breaking Biology News(10 mins):Aware, Inc. Reports Second Quarter 2015 Financial Results 2Aware, Inc. Reports Second Quarter 2015 Financial Results 3Aware, Inc. Reports Second Quarter 2015 Financial Results 4Aware, Inc. Reports Second Quarter 2015 Financial Results 5Aware, Inc. Reports Second Quarter 2015 Financial Results 6FPC's Touch Fingerprint Sensor FPC1025 in ZTE's Smartphone Axon 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4
... skull-splitting pain. Scientists have found evidence that the headaches ... parts of the brain starved for oxygen and altering ... the work by neuroscientists at the University of Rochester ... , The scientists say the work makes it ...
... new study appearing in the May issue of The ... geologists must account for when examining dinosaur tracks. The ... family of dinosaurs that includes the T. Rex and ... effects of many different types of erosion on these ...
... more than just making pie, according to new data from ... researchers and presented today at a major scientific meeting. ... animals that received powdered tart cherries in their diet had ... the liver, lower oxidative stress and increased production of a ...
Cached Biology News:Mice with a migraine show signs of brain damage 2Mice with a migraine show signs of brain damage 3Mice with a migraine show signs of brain damage 4Mice with a migraine show signs of brain damage 5How to look at dinosaur tracks 2A cherry on top: Tart cherries may alter heart/diabetes factors 2A cherry on top: Tart cherries may alter heart/diabetes factors 3A cherry on top: Tart cherries may alter heart/diabetes factors 4
... Caliper's iLink makes it easy to supply ... instruments. Developed with operator convenience in mind, ... shoot' ease of use. The iLink software ... for assays or sub-assays, that can be ...
... As research demands continue to grow, ... more spectral information has become necessary, especially ... spectral colors. The innovative C1si Confocal Microscope ... speed and spectral capability not available in ...
... LAS-3000 imaging system combines new CCD ... interface, providing significantly improved system sensitivity ... The LAS-3000 provides significantly improved system ... applications including: fluorescence, chemifluorescence, chemiluminescence, and ...
The LAS-3000 imaging system combines new CCD camera technology with a simplified user interface to provide significantly improved system sensitivity with a wide range of modularities. This system is...
Biology Products: