ISSN:0032-3888    

DOI:10.1002/pen.760010102

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractA study was designed to show the nature of weathering of an elastomer poly( ester‐urethane), and to indicate methods of overcoining the deficiency. Unprotected polymer, when exposed to UV radiation in a Weatherometer, showed deterioration which is characterized by loss of tensile strength, some increase in modulus, and a decreased extensibility of surface ski

ISSN:0032-3888    

DOI:10.1002/pen.760010103

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractTranslated from:Vysokomolekuliarnye Soedineniia2, 778–84 (May 1960). A thermomechanical study was made of the softening of crystalline polymers during uniform, uniaxial stretch and also of the effect of the rate of heating upon the softening or amorphous polymers. The effect of the tensile force on the thermo‐mechanical behavior of various polymers was measured over the range 20 to 100 kg/cm2and within wide temperature limits (−150° to 250°C). Ribbons 50 mm long, 2‐4 mm wide and 0.05 to 0.5 mm thick served as

ISSN:0032-3888    

DOI:10.1002/pen.760010104

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractA description is given of the procedure and equipment used for the purpose of studying the effect of hydrostatic pressure upon the capillary flow properties of polymer melts. Flow properties are reported for a low density polyethylene over a wide range of temperatures, die sizes, different pressures and hydrostatic pressures.

ISSN:0032-3888    

DOI:10.1002/pen.760010105

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractThe degradation of plastics by ultraviolet energy and the use of protective ultraviolet absorbers to improve stability necessitate studies along several lines. These include (a) the measurement of the ultraviolet spectral energy distribution of sunlight and of the indoor accelerated test sources, (b) the measurement of the extent of degradation as a function of the wavelength of the incident radiation, (c) an estimate of the absorbing effectiveness of the added protective agents, and (d) the stability of the protective ultraviolet absorbers themselves.

ISSN:0032-3888    

DOI:10.1002/pen.760010106

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractThe effectiveness of ultraviolet stabilizers of various types of polyolefin, cellulose ester, and poly (vinyl chloride) plastics was investigated. Most of these stabilizers were of the ultraviolet‐absorbing type but two were of the nonabsorbing type. Exposures were made both outdoors and indoors in a Twin‐Arc Weatherometer. The latter was modified by the addition of ten 20‐watt fluorescent sun lamps to remedy the short‐ultraviolet deficiency of the enclosed carb

ISSN:0032-3888    

DOI:10.1002/pen.760010107

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractA study was designed to show the nature of weathering of an elastomer poly(ester‐urethane), and to indicate methods of overcoming the deficiency. Unprotected polymer, when exposed to UV radiation in a Weatherometer, showed deterioration which is characterized by loss of tensile strength, some increase in modulus, and a decreased extensibility of surface ski

ISSN:0032-3888    

DOI:10.1002/pen.760010108

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractThe non‐Newtonian flow behavior of polyethylene has been investigated with respect to the effects of molecular weight and molecular weight distribution. Effects of die geometry on melt fracture as well as preliminary extrudate orientation studies are discusse

ISSN:0032-3888    

DOI:10.1002/pen.760010109

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

摘要:

AbstractA new curing system which yields room temperature curing epoxy adhesives with high bond strength and softening point has been developed for service in contact with high explosives. Bisphenol A type resins cured with hydroxyl alkyl phosphate acid esters are used. Short pot life and relatively low alkali resistance are drawbacks of the system.

ISSN:0032-3888    

DOI:10.1002/pen.760010110

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY

ISSN:0032-3888    

DOI:10.1002/pen.760010111

出版商:Society of Plastics Engineers, Inc.    

年代:1961

数据来源: WILEY