In 1974, as we approached the National Bicentennial and the Centenary of the American Chemical Society, Professor Otto Vogl, then Chairman of the Division of Polymer Chemistry, arranged a very special symposium dedicated to a review of the history of the Divi­ sion. It was an extraordinary occasion which included remarks by Professors Herman Mark, Charles Marvel, William Bailey, and Charles Overberger, all past Chairmen of the Division. The Executive Committee of the Division of Polymer Chemistry felt that 1976 deserved even more attention since it was to be also the 25th, the Silver Anniversary, of the Division of Polymer Chemis­ try. This year would be a most appropriate one not only to review milestones in our discipline, but also to look to the future. It was decided to undertake this volume and Dr. R. D. Ulrich agreed to serve as editor in assembling the collected papers. It is the hope of the officers of the Division that this volume will serve many purposes - a reference text, a record, and a source of perspective. F. E. Bailey Chairman (1976) Division of Polymer Chemistry American Chemical Society vii Contents R. D. Ulrich - The History of the ACS Division 1 of Polymer Chemistry, Inc. Bovey F. A. 31 F. R. Eirich 53 J. D. Ferry 63 P. J. Flory 69 Huggins M. L. 99 L. Mandelkern 113 123 H. F. Mark • C. S. Marvel 133 B. Maxwell 143 .

In 1974, as we approached the National Bicentennial and the Centenary of the American Chemical Society, Professor Otto Vogl, then Chairman of the Division of Polymer Chemistry, arranged a very special symposium dedicated to a review of the history of the Divi­ sion. It was an extraordinary occasion which included remarks by Professors Herman Mark, Charles Marvel, William Bailey, and Charles Overberger, all past Chairmen of the Division. The Executive Committee of the Division of Polymer Chemistry felt that 1976 deserved even more attention since it was to be also the 25th, the Silver Anniversary, of the Division of Polymer Chemis­ try. This year would be a most appropriate one not only to review milestones in our discipline, but also to look to the future. It was decided to undertake this volume and Dr. R. D. Ulrich agreed to serve as editor in assembling the collected papers. It is the hope of the officers of the Division that this volume will serve many purposes - a reference text, a record, and a source of perspective. F. E. Bailey Chairman (1976) Division of Polymer Chemistry American Chemical Society vii Contents R. D. Ulrich - The History of the ACS Division 1 of Polymer Chemistry, Inc. Bovey F. A. 31 F. R. Eirich 53 J. D. Ferry 63 P. J. Flory 69 Huggins M. L. 99 L. Mandelkern 113 123 H. F. Mark • C. S. Marvel 133 B. Maxwell 143 .

The development of miniaturized and ruggedized optical circuits, containing a number of optical and perhaps also electronic components integrated on the same substrate, and performing useful optical functions - this is the goal of the key technologies for future systems of communication, of instrumenta­ tion, and of general signal processing; it is expected to combine and to complement the established technologies of microelectronics, optoelectronics, and fiber-optics. Today, after more than fifteen years of research on integrated optics, this goal appears to be almost within reach. The theoretical problems of 1ight propagation and of numerous forms of coupling and interactions in integrated-optical structures are generally well understood. A great variety of single components for integrated optics has been demonstrated experimen­ tally, and more recently also the successful integration of several compo­ nents on a common substrate. Laboratory operation of such integrated-optical ''chips'' has been reported, e.g., for RF spectrum analysis, for high-speed analog/digital conversion, for a fiber-optic gyro, and for various high-per­ formance semiconductor laser sources. Before commercial fabrication and technical application of such devices can take place, however, their performance has to be further improved. Se­ rious technological and material problems are still to be overcome which are related to the small transverse dimensions and high optical power densities typical for integrated-optical waveguides. Progress can be expected here by further improvements and diversifications of micro-fabrication technologies and (perhaps more efficiently) by learning how to better adapt the optical structures to the existing technologies.

In 1974, as we approached the National Bicentennial and the Centenary of the American Chemical Society, Professor Otto Vogl, then Chairman of the Division of Polymer Chemistry, arranged a very special symposium dedicated to a review of the history of the Divi­ sion. It was an extraordinary occasion which included remarks by Professors Herman Mark, Charles Marvel, William Bailey, and Charles Overberger, all past Chairmen of the Division. The Executive Committee of the Division of Polymer Chemistry felt that 1976 deserved even more attention since it was to be also the 25th, the Silver Anniversary, of the Division of Polymer Chemis­ try. This year would be a most appropriate one not only to review milestones in our discipline, but also to look to the future. It was decided to undertake this volume and Dr. R. D. Ulrich agreed to serve as editor in assembling the collected papers. It is the hope of the officers of the Division that this volume will serve many purposes - a reference text, a record, and a source of perspective. F. E. Bailey Chairman (1976) Division of Polymer Chemistry American Chemical Society vii Contents R. D. Ulrich - The History of the ACS Division 1 of Polymer Chemistry, Inc. Bovey F. A. 31 F. R. Eirich 53 J. D. Ferry 63 P. J. Flory 69 Huggins M. L. 99 L. Mandelkern 113 123 H. F. Mark • C. S. Marvel 133 B. Maxwell 143 .

In 1974, as we approached the National Bicentennial and the Centenary of the American Chemical Society, Professor Otto Vogl, then Chairman of the Division of Polymer Chemistry, arranged a very special symposium dedicated to a review of the history of the Divi­ sion. It was an extraordinary occasion which included remarks by Professors Herman Mark, Charles Marvel, William Bailey, and Charles Overberger, all past Chairmen of the Division. The Executive Committee of the Division of Polymer Chemistry felt that 1976 deserved even more attention since it was to be also the 25th, the Silver Anniversary, of the Division of Polymer Chemis­ try. This year would be a most appropriate one not only to review milestones in our discipline, but also to look to the future. It was decided to undertake this volume and Dr. R. D. Ulrich agreed to serve as editor in assembling the collected papers. It is the hope of the officers of the Division that this volume will serve many purposes - a reference text, a record, and a source of perspective. F. E. Bailey Chairman (1976) Division of Polymer Chemistry American Chemical Society vii Contents R. D. Ulrich - The History of the ACS Division 1 of Polymer Chemistry, Inc. Bovey F. A. 31 F. R. Eirich 53 J. D. Ferry 63 P. J. Flory 69 Huggins M. L. 99 L. Mandelkern 113 123 H. F. Mark • C. S. Marvel 133 B. Maxwell 143 .

The development of miniaturized and ruggedized optical circuits, containing a number of optical and perhaps also electronic components integrated on the same substrate, and performing useful optical functions - this is the goal of the key technologies for future systems of communication, of instrumenta­ tion, and of general signal processing; it is expected to combine and to complement the established technologies of microelectronics, optoelectronics, and fiber-optics. Today, after more than fifteen years of research on integrated optics, this goal appears to be almost within reach. The theoretical problems of 1ight propagation and of numerous forms of coupling and interactions in integrated-optical structures are generally well understood. A great variety of single components for integrated optics has been demonstrated experimen­ tally, and more recently also the successful integration of several compo­ nents on a common substrate. Laboratory operation of such integrated-optical ''chips'' has been reported, e.g., for RF spectrum analysis, for high-speed analog/digital conversion, for a fiber-optic gyro, and for various high-per­ formance semiconductor laser sources. Before commercial fabrication and technical application of such devices can take place, however, their performance has to be further improved. Se­ rious technological and material problems are still to be overcome which are related to the small transverse dimensions and high optical power densities typical for integrated-optical waveguides. Progress can be expected here by further improvements and diversifications of micro-fabrication technologies and (perhaps more efficiently) by learning how to better adapt the optical structures to the existing technologies.