For Polymer Branching Information... Think Low Angle Laser Light Scattering
Chromatix* Low Angle Laser Light Scattering (LALLS) detectors and software give unique polymer branching data when coupled with Gel Permeation Chromatography (GPC). RESULTS: NBS Polymer Standard SRM-1476 is known to contain branched material. The LALLS detector clearly indicates a high molecular weight fraction that is below the detection limit of the Differential Refractive Index (DRI) detector. CONCLUSIONS: The CMX-100 LALLS detector is inherently sensitive to high M w polymers and can yield unique results complementary to conventional GPC concentration detectors such as a differential refractive index unit (DR I). Only with LALLS can the polymer analyst realize the full potential of GPC for branched materials. POLYETHYLENE SRM 1476 (NBS) Sample: Low density polyethylene Temperature: 135°C Columns: Shodex 8 0 2 , 3, 4 , 5 Solvent: TCB \ Flow Rate: 0 . 5 m L / m i n . \ Instrument: Rl Detector
Sample: Temperature: Columns: Solvent: Flow Rate: Instrument:
Low density polyethylene 135°C Shodex802. 3 , 4 , 5 TCB 0.5mL/min. CMX-100
LALLS SOLVES PROBLEMS: It can easily detect the presence of that small concentration of high M w polymer that would otherwise escape detection by using only a concentration detector. These unseen small concentrations of very high M w branched polymers can dramatically alter the performance and processing characteristics of the material in many different applications. The production or end-use suitability, of your polymer may be assured when LALLS data is used for routine quality control. FAST AND EASY TO USE: The CMX-100 system is designed with unique features that save time and money: • No GPC calibrations needed • Absolute M w for branched and linear polymers • No lengthy and difficult post run calculations required LDC/Milton Roy proprietary software dramatically extends the data generated by the CMX-100. It provides complete data formatting and many special calculation routines. All are available through easy-to-use-and-understand "menu"-driven prompting, specifically designed for the polymer chemist. AFFORDABLE: The CMX-100 is designed to provide routine LALLS information to the polymer analyst at a surprisingly affordable price. The CMX-100 interfaces easily and quickly to your present GPC system and can operate at temperatures up to 150°C. It can be used with equal ease for aqueous and nonaqueous polymers. COMPLETE SERVICE AND SUPPORT: Field service is now available through the extensive LDC/Milton Roy network. We maintain a complete applications laboratory to support your needs in GPC/LALLS. Call or write for additional information and the name of the nearest LDC/Milton Roy Sales/Service Representative. Chromatix® Product Manager Toll Free 800-538-1595 or (408) 736-0300 (U.S.A. only)
LDC/Milton Roy
U.S. H E A D Q U A R T E R S , P.O. Box 10235, Riviera Beach, FL 33404 Toll-free: 800-327-6182, In Florida: (305) 844-5241 International Telex: 441098, Domestic Telex: 513479 S U N N Y V A L E O P E R A T I O N . 560 Oakmead Parkway, Sunnyvale, CA 94086 Toll-free: 800-538-1595, In California: 1408) 736-0300 U N I T E D K I N G D O M , LDC U K , Milton Roy House, 52 High Street, Stone, Staffordshire ST15 8 A R England Phone: 785-81-3542 Telex: 36623 WEST G E R M A N Y , Milton Roy IDeutschlend) GMBH Jahnstrasse 22-24 6467 Hasselroth 2. West Germany Phone: 6055-2031 (3366I Telex: 4 1 8 4 3 5 7 JAPAN. Milton Roy K.K., Takanawa Dai-lchi Building 2 1 - 4 1 , Takanawa 2-Chome, Minato-Ku, Tokyo 108, Japan Phone: (031473-3181 Telex: 242-4296
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ANALYTICAL CHEMISTRY, VOL. 55, NO. 4, APRIL 1983 • 487 A
